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Did you know?
Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
Did you know?
Ether was used widely for surgeries but became less popular because of its flammability and its tendency to cause vomiting. In England, it was quickly replaced by chloroform, but this agent caused many deaths and lost popularity.
Did you know?
The U.S. Preventive Services Task Force recommends that all women age 65 years of age or older should be screened with bone densitometry.
Did you know?
Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%
Did you know?
The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").
![Forest fragments left by clear-cutting forest from the surrounding landscape have very different phy](https://biology-forums.com/gallery/47/medium_33_19_02_12_5_42_32_2064795.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)