How would life on Earth change if the Moon vanished overnight?

 If the Moon vanished tonight, Earth wouldn't be destroyed by massive earthquakes. Instead, the world's oceans would be instantly, profoundly silenced.

The Moon is the primary engine behind Earth's tidal system, and its absence would fundamentally rewrite the rules of life on the planet. The first noticeable change would be the tides. The oceans would not become completely still, as the Sun's gravity also pulls on Earth's water, but solar tides are only about 40% as strong as lunar tides. High and low tides would shrink dramatically. This sudden drop in tidal churn would devastate intertidal zones—the nutrient-rich coastal regions where land and sea meet. Crabs, mussels, starfish, and the millions of migratory birds that rely on these ecosystems for food would face immediate starvation, sending a shockwave of extinction up the marine food chain.

When night fell, the planet would plunge into an unprecedented darkness. Without the Moon to reflect sunlight, nights would be illuminated only by stars and the faint glow of the Milky Way. This sudden darkness would disrupt thousands of nocturnal species. Predators like lions and owls rely on moonlight to hunt, while species like sea turtles depend on the moon's reflection to guide hatchlings to the ocean. Furthermore, the reproductive cycles of countless marine organisms, such as corals that synchronize their mass spawning events to the phases of the moon, would be completely derailed.

However, the most severe consequence would unfold slowly over millions of years. The Earth rotates on an axis tilted at roughly 23.5 degrees, which gives the planet its predictable, life-sustaining seasons. The Moon acts as a massive gravitational anchor, keeping this tilt remarkably stable. Without the Moon, Earth's axis would eventually wobble chaotically. Astronomers calculate that the planetary tilt could shift anywhere from 0 to 85 degrees over time. At an 85-degree tilt, the Earth would rotate almost on its side. The poles would be exposed to continuous, baking sunlight for six months, melting all ice, while the equator would freeze in permanent darkness.

Ultimately, while humans and terrestrial animals might survive the immediate darkness and quieted oceans, the loss of the Moon would slowly transform Earth into a wildly unpredictable and largely inhospitable world.

What will Earth be like in 999 trillion years?

 As other answers have said, the Earth will be long gone.

Moreover you’re asking about a time that’s on the order of 100,000 times the current age of the universe. Extrapolating what we know today onward to a future that distant would be like trying to look at a sperm that’s within one hour of conception and use that to visualize how a 10 year old child will look.

Regardless of what various physical theories might predict, we actually know very little about what a time 1,000,000,000,000,000 years in the future would look like.

What is the most dangerous animal on earth?

 If you believe this fact, the most dangerous animal is a Nile crocodile named Gustave.

First seen in Burundi in 1998, Gustave was estimated to be 60 years old, weigh 1 ton, and measure 6.1 meters long in 2004. Later, Gustave sightings were recorded at other times.

It is believed that Gustave was last seen in 2008. In fact, Gustave has become larger, measuring over 7 meters in length.

The crocodile suspected to be Gustave.

Gustave is believed to have killed 300 people although he never took human victims. He prefers to eat hippos where most crocodiles are usually afraid and shy away from hippos.

The crocodile, thought to be Gustave, greedily devoured its innocent victims.

The locals vow to kill Gustave, but have so far been unsuccessful. Of the 300 people killed, it is believed that half of the 300 people killed by Gustave were hunters who wanted to find him.

Gustave's experts

Gustave is believed to be distinguishable from other crocodiles by his gunshot wounds and his ferocity. This means that few who have seen him have survived.

Several crocodiles thought to be Gustave have been shot and killed.

But then renowned Gustav expert, Patrice Faye, believed that they were all small lizards and Gustav was still roaming free.

You can't ignore that the whole story might be just nonsense.

Do gods still come to Earth these days?

 

" yamaha " is one of the magnificent names in the * Vishnu Sahasranama * (The Thousand Names of Vishnu). Adi Shankara, in his commentary, interpreted "Yama" as " He who guides from within "

Alternatively, one may conceive of Him as " He who resides within and provides guidance ". Residing in close proximity to the spine within the physical body, Lord Yama continuously records the karmic consequences of the soul (*Jiva*). This constitutes His subtle body.

"Yama" also signifies "He who restrains" — the One who ensures that all things remain in their proper order.

" yah prithivIm antarO yamayati......" — *Brihadaranyaka Upanishad*. This verse declares that He who resides within the Earth and restrains the Earth; who resides within Fire and restrains Fire; and who resides within the Wind and restrains the Wind—He is Yama.

He establishes rules; should they be defied, He exercises His power of restraint.

Yama is *Samavarti*—the Impartial Judge. He is the very embodiment of serenity; to those who perform virtuous deeds, He appears in this benevolent form. Yama reveals Himself to the soul just prior to the moment of death. However, to sinners, He appears in a terrifying guise—with blazing red eyes, protruding fangs, a long nose, and wielding a noose (*Pasha*). The sinner is struck with abject terror.

The * kaThOpanishad * presents the profound dialogue between Yama and Nachiketa. This Upanishad offers a magnificent exposition on the true nature of the Soul (*Atman*).

Yama is one of the divine entities who constantly observe and witness our karmic actions.

The *Garuda Purana* affirms this truth, stating: "The Sun (*Aditya*), the Moon (*Chandra*), the Wind (*Anila*), Fire (*Anala*), the Earth (*Bhumi*), Water (*Apa*), the Heart (*Hridaya*), Yama, Day (*Ahas*), Night (*Ratri*), the two Twilights (*Sandhyas*), and *Dharma*—these are the witnesses who observe and know the conduct of every human being." All these entities serve as witnesses, constantly observing the actions of living beings.

These witnesses report matters exactly as they are; they take note of every deed—whether performed knowingly or unknowingly. One can safeguard oneself by cultivating a favorable relationship with them.

How?

Through " vrataiScha dAnaiScha satyam......"—that is, through the observance of vows and acts of charity. If these practices are performed consistently, all these witnesses become pleased. Consequently, they will bear favorable testimony.

Among these witnesses resides the Heart—the Inner Self. We are, in fact, fully aware of our own actions; yet, the veil of *Maya* (illusion) often obscures this awareness.

Gods will not come at times, they stay with us always, observe our actions and guide us.

Best example is Sun. He, in the form of his rays, always touches us.

Subhamastu

What will the last humans see and think when the Sun melts the Earth?

Surprisingly, the existence of humans, or their biological or robotic descendants, is projected to extend Earth's lifespan before it is melted by the aging Sun. This disregards any human efforts to extend the habitability of our planet by building shades or altering Earth’s orbit.

Our system is already 4.5 billion years old, and it’s roughly halfway through its life before it becomes a tiny white dwarf. Before it happens, it will expand and become a red giant. It will then absorb Mercury and Venus. The fate of Earth is less certain because, as the Sun expands, it will also lose mass, causing the orbits of the remaining planets to expand. Most likely, Earth will be devoured in a manner similar to that of Venus. There is a small chance that it will become a burnt ember of what it was if it's spared this sorry fate.

In the run-up to this, many natural systems that make our planet habitable will fail one by one. For decades, we thought we might have only 600 to 800 million years before Earth becomes uninhabitable, and many answers on Quora still repeat this, but recently, we have made some progress in knowing with greater certainty the real fate of our planet. There is even a chance that we might have up to 1.5 billion years before it becomes uninhabitable, assuming that humans or our biological or robotic descendants are gone.

It is projected that as hundreds of millions of years pass from the present, the atmosphere will become increasingly devoid of carbon dioxide, which is used by plants. This will happen because our planet will receive more heat from the Sun, accelerating rock weathering and increasing the rate of carbon dioxide absorption. Also, the plate tectonics, which recycles nutrients over geological timescales, might end.

We currently produce copious amounts of this gas as a byproduct of industrialization. If our descendants still exist, it’s safe to assume that we will still be supplying the atmosphere with this gas. Hopefully, it will not be ruined by the speed at which we are releasing these gases now.

If the lowering of carbon dioxide concentration can be avoided, the next dangerous step will be the increase in the energy Earth will receive from the aging Sun. If our descendants don’t step up and either build a shade or move Earth’s orbit away, then the upper limit of Earth’s habitability will be around 2 billion years.

It will then become so hot that the oceans will boil away, and we will not be able to live on Earth as it melts under the Sun's expansion. This will happen on timescales of another two billion years or so. Although Earth’s orbit would tend to expand as the Sun loses mass, tidal effects and the Sun’s enormous growth may still lead to engulfment.

At some point, its rocks will melt, and a global magma ocean will cover the surface, erasing the entire history of our planet, the good and the bad. When Sun’s surface approaches really close, Earth will at some point start to be dragged by the Sun’s atmosphere, and it will spiral into its plasma and literally melt. This will only be possible to witness from a distance and not from the surface.

Could we ever create a black hole on Earth?

 Short answer is - Yes. Scientist at CERN tried to create a micro black hole at large hadron collider (LHC),but it is too unstable that it could vanish near than 10^-25 second. As the black hole is too small,it can vaporize too fast due to Hawking radiation.

Our current technology is unable to produce such a micro black hole at laboratory. Though that black hole can't harm to earth. Scientist can simulate that black hole but to create such needs massive amount of energies which can be produced by collision of energetic particles at near speed of light at LHC.

Detection of mini black holes at the LHC.

What is the strangest place on Earth?

 Not many people can claim hell as their birthplace.

But Todd Domboski and the few thousand former residents of Centralia, Pennsylvania, come closest to that distinction.

Signs warn visitors of the dangers of death by suffocation or being swallowed by the ground, but the old mining town of Centralia, Pennsylvania, was once home to more than 1,000 people.

Now it is nothing more than a smoldering ghost town that has been burning for half a century.

It started with a fire that was intentionally set to burn out a landfill for Labor Day in 1962.

The problem was that the dump was also an old mine connected to a maze of abandoned underground mine tunnels full of coal.

Although the city managed to extinguish the fire above ground, a much larger inferno burned beneath it, eventually making its way under the city center of Centralia.

The fire was so widespread, destructive, and endless—it is said that there is enough coal underground to stoke the fire for another 250 years.

- that in 1980 a $42 million plan prompted most residents to move (most houses were demolished), leaving only about a dozen survivors behind.

What is the most rare and expensive metal on earth?

 The most rare and expensive metal on earth is rhodium. This precious metal is extremely rare and can be best described as a silver-white, hard, corrosion-resistant inert transition metal. It belongs to the platinum group metals (PGMs) and has the chemical symbol Rh and the atomic number 45.

Rhodium is mainly used in catalytic converters, which are devices that reduce harmful emissions from vehicle exhausts. It is also used in some jewelry, electrical contacts, and industrial equipment. Rhodium is highly valued for its high melting point, durability, and resistance to oxidation and corrosion.

Rhodium is very scarce and difficult to extract. It is usually obtained as a by-product of mining and refining platinum or palladium. The price of rhodium fluctuates depending on the supply and demand factors. In 2020, rhodium reached a record high of over $13,000 per troy ounce, making it more than 10 times more expensive than gold. But rhodium prices can also drop sharply due to economic downturns or technological changes.

Rhodium is mostly mined in South Africa, which accounts for about 80% of the global supply. Other major producers are Russia, Canada, and Zimbabwe. Rhodium is traded on the London Platinum and Palladium Market (LPPM) and the New York Mercantile Exchange (NYMEX).

What is the most boring country on earth?

 Nauru.

(It's pronounced as Na-u-ru, btw)

Nauru is an Island in Oceania and the third smallest country in the world, with an area of 21 square kilometres. There are 12.000 people living there, 94% of them are overweight, 70% obese, so if you're one of the 200 annual tourists, you're probably the healthiest. The entire country has exactly one club, if you're banned from entering it, you have to swim 700km to the next one, have fun.
Nauru has one actual street that goes around the entire country. It takes 25 minutes to drive the entire length. If you want to go on a holiday there, you can live in the only hotel this place has. Technically, there are like 6, but you can only book a room in one, lol.

Nauru has a lot of beaches, but because of the ocean current, you can't swim there.

The main attraction of this country is a Phosphate loading facility, very pretty. Alternative, the country also has like 5 churches.
In general, 80% of this island is a Phosphate mining plant. There are like 3 Trees on there. And 3 random stones in the ocean.

And maybe you're now thinking "perfect for being alone" i mean yeah, but the internet is quite terrible there too, so have fun doing literally nothing.

Are any stars or galaxies similar in size to Earth?

 Sirus B is a White Dwarf star orbiting the bright star Sirius A in the constellation Canis Major, located about 8.6 light-years from Earth. Practically our neighbour. It is almost as big as earth, with a 12,000 km Diameter.

Galaxies, even the small ones, are an order of magnitude bigger than Earth (which is 12,742 km in diameter). Seque 2, one of the smallest known galaxies and a satellite of the Milky Way located approximately 114,000 light-years away, is about 220 light-years in diameter.

Around 160 trillion Earths could fit side-by-side along the diameter of Seque 2.

Space is fun, scary and big.

Why are there only seven continents?

 It's humans who make the lines, not the earth.

Thick plates drifting over deep fire.

Europe. Asia. They share one crust - it is unbroken.

If we call it Eurasia, there are six left over. If we go further south, we find a huge ocean shelf that has sunk long ago. If we call that one Zealandia, that makes eight.

Our maps lie to us. We split land by culture, but it makes hard borders with no water.

Hard rocks do not care that we name them. Large pieces slowly move away from each other. Ancient oceans dry up. New lands completely covered up.

The mapmakers. They find comfort in the numbers. Underneath the surface, the earth constantly moves, shifting under the heavy foot. Soon, the ice will melt, raising the black water to swallow the shores we know.

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It breaks through the boundaries we created long ago - Our beautiful drawing breaks apart yet again.

What is the most dangerous place on Earth?

 North Korea Jail

Disturbing images ahead!!!!!!

I don’t own any of the images below. They are downloaded from google.

Most of the answers included Natural places which are dangerous to live. However, here I would like to show share a place which is driven by a naughty fat boy who himself consider as God. The place is so dangerous that if you steal a Propaganda from A HOTEL, THERE IS 15 YEARS OF JAIL!!!!!

The place is none other than - North Korean Jail.

Prisoners are forced to starve-

Pregnancy is biggest crime in jail!

for small mistakes, there are harsh punishments-

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and if somehow they escaped or freed from the hell, they will not survive long enough..

Inside North Korea's barbaric jails where prisoners dig their own graves

Revealed: Life inside North Korea's torturous prison camps

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Read more about North Korea-

Mohammad Ahmed's answer to Why is North Korea so fascinating?

What is the most dangerous place on Earth?

 Verkhoyansk, Russia

Located deep in the heart of Siberia and 3000 miles east of Moscow, Verkhoyansk is one of the coldest cities in the world. Referred to as the Cold Pole, the city is well-known for its endless winters, with the Yana River frozen solid nine months of the year.

Winter temperatures fall between minus 60 and minus 40 degrees Fahrenheit, and from September to March, the city averages fewer than 5 hours of sunlight every day. For most of its history Verkhoyansk was used as an exile city by czars and Soviets.

Lake Kivu, Democratic Republic of Congo/Rwanda

Renowned as one of the great lakes of Africa, Lake Kivu is located along the border between Congo and Rwanda. But deep below its surface, the lake houses over 2.3 trillion cubic feet of methane gas and 60 cubic miles of carbon dioxide, which, if released, can spark a methane explosion, incite lake tsunamis and kill the two million residents that call the basin home. Trying to think positive? The gas will likely be released only if volcanic activity occurs below the lake.

Dallol, Ethiopia

If Verkhoyansk is the coldest city in the world, then Dallol, Ethiopia is the antithesis. Located five hours outside of Ethiopia’s center in the Danakil Desert, Dallol is known by locals as “the Gateway to Hell”. It’s an apt title for the hottest inhabited place on Earth, where temperatures in summer reach up to 148 degrees Fahrenheit.

Average temperatures hover around 94 degrees Fahrenheit, but that’s of little relief to the locals. To add fuel to fire, the rugged region is a revelation of salt flats, active volcanoes and regular earthquakes. Unsurprisingly, given the settlement’s inhospitable climate and lack of infrastructure.

Somalia

Since the civil war began in 1990, Somalia has been divided into over two dozen warring groups. Disease, famine, and ineffective governance have contributed to the rise of terrorist factions, which have further cracked Somalia’s already fumbling foundations, embroiling it in crime and violence.

Famine is a perennially devastating issue in in Somalia, and from 2010 to 2012 it claimed the lives of over 260,000 people. According to an annual ranking by Foreign Policy and the Global Fund for Peace, Somalia is the most failed state in the world. Tourists, suffice to say, are non-existent.

Why don’t we find any living dinosaur species on Earth now?

 But we do! We see them all the time, flying above our heads and making nests where they can.

And if they’re not flying, they’re chasing you and you should be running for your life (unless it’s a kiwi), and it might have a raptor claw. Meet the cassowary.

(If you mean the big guys though, like triceratops and t-rex, it was an asteroid the size of mt. everest. The crater can be found on chicxulub peninsula in Mexico.)