|
|
Did you know?
Vaccines prevent between 2.5 and 4 million deaths every year.
Did you know?
Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
Did you know?
The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
Did you know?
If all the neurons in the human body were lined up, they would stretch more than 600 miles.
Did you know?
There are more nerve cells in one human brain than there are stars in the Milky Way.