It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.
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Excessive alcohol use costs the country approximately $235 billion every year.
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A good example of polar molecules can be understood when trying to make a cake. If water and oil are required, they will not mix together. If you put them into a measuring cup, the oil will rise to the top while the water remains on the bottom.
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There are approximately 3 million unintended pregnancies in the United States each year.
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Medication errors are more common among seriously ill patients than with those with minor conditions.
Social grooming in a pair
Skull of Crocuta sivalensis, an extinct Indian hyena
Indian spitz
Sunlight consists of a spectrum of colors, visible here in a rainbow.