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Methicillin-resistant Staphylococcus aureus or MRSA was discovered in 1961 in the United Kingdom. It if often referred to as a superbug. MRSA infections cause more deaths in the United States every year than AIDS.
There are more nerve cells in one human brain than there are stars in the Milky Way.
In 1864, the first barbiturate (barbituric acid) was synthesized.
Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
It is believed that the Incas used anesthesia. Evidence supports the theory that shamans chewed cocoa leaves and drilled holes into the heads of patients (letting evil spirits escape), spitting into the wounds they made. The mixture of cocaine, saliva, and resin numbed the site enough to allow hours of drilling.
![The path of blood flow through the chambers of the left and right side of the heart, including the v](https://biology-forums.com/gallery/47/medium_14755_10_09_12_7_22_09_8519715.jpeg)
![Continuous positive airway pressure (CPAP) device. The sleeping subject is receiving the benefits of](https://biology-forums.com/gallery/47/medium_14755_11_11_12_7_25_45_10061802.jpeg)