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Did you know?
The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
Did you know?
People about to have surgery must tell their health care providers about all supplements they take.
Did you know?
The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
Did you know?
In 1835 it was discovered that a disease of silkworms known as muscardine could be transferred from one silkworm to another, and was caused by a fungus.
Did you know?
In 1864, the first barbiturate (barbituric acid) was synthesized.
![Results from sequential study of two cohorts tested at three ages and at three different points in t](https://biology-forums.com/gallery/47/medium_6_31_05_15_8_20_43_219751572.jpeg)
![Richmond, Virginia, lies in ruins in April 1865 at the time of Lincoln’s visit—and a few days before](https://biology-forums.com/gallery/47/medium_376063_22_08_15_11_28_16_223621687.jpeg)