Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
Did you know?
During pregnancy, a woman is more likely to experience bleeding gums and nosebleeds caused by hormonal changes that increase blood flow to the mouth and nose.
Did you know?
The average office desk has 400 times more bacteria on it than a toilet.
Did you know?
Stroke kills people from all ethnic backgrounds, but the people at highest risk for fatal strokes are: black men, black women, Asian men, white men, and white women.
Did you know?
Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
Structure of the water molecule
The structure of B-DNA from studies of molecular crystals