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The U.S. Preventive Services Task Force recommends that all women age 65 years of age or older should be screened with bone densitometry.
Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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.
It is widely believed that giving a daily oral dose of aspirin to heart attack patients improves their chances of survival because the aspirin blocks the formation of new blood clots.
Nitroglycerin is used to alleviate various heart-related conditions, and it is also the chief component of dynamite (but mixed in a solid clay base to stabilize it).
![Where mangrove diversity is high, mangrove species show clear patterns of vertical zonation relative](https://biology-forums.com/gallery/47/medium_33_28_08_11_12_17_16_16021832.jpeg)
![Bone fractures that occur before death show signs of healing. The process of fracture healing starts](https://biology-forums.com/gallery/47/medium_273688_23_02_15_8_21_24_20896625.jpeg)