What scientific photos are hard to believe but are indeed real?

 These microscopic world of human body.

1. Stem cells.

2. Bone cells

3. Blood cells.

4. Muscle cells.

5. Fat cells.

6. Skin cells.

7. Nerve cells.

8. Lung cells.

9. Sex cells.

10. Pancreatic cells.

11. Cancer cells.

12. Breast cancer cells.

13. Artery and blood cells.

14. Human embryo, 3 days old.

15. Brain cells.

16. Human Eye.

17. Lungs.

18. Eye-lashes.

19. Surface of a tongue.

20. Hair.