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Did you know?
Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.
Did you know?
If all the neurons in the human body were lined up, they would stretch more than 600 miles.
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?
Certain rare plants containing cyanide include apricot pits and a type of potato called cassava. Fortunately, only chronic or massive ingestion of any of these plants can lead to serious poisoning.
Did you know?
There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
![Hyperopia (farsightedness). In the uncorrected top figure, the image would come into focus behind th](https://biology-forums.com/gallery/47/medium_14755_27_08_12_12_24_59_82001466.jpeg)
![Martin Van Buren, sitting uncomfortably for this engraving, would eventually ascend to the presidenc](https://biology-forums.com/gallery/47/medium_374628_16_08_15_9_59_54_222701478.jpeg)