These chains come in a wide range of lengths. In humans a typical protein is about 400 amino acids long; some are a lot longer. Molecules of RNA, one of the two nucleic acids, can reach up to 100,000 ...

Anyone can get foot pain without warning. After a long day, some people experience a slight tingling sensation in their toes. Others get a burning feeling at night that nearly prevents them from ...

The approval of a high seas treaty means new protections will be possible in international waters for the first time. Here's a rundown of what the treaty is, why it matters and what is still to come.

The approval of a high seas treaty means new protections will be possible in international waters for the first time. Here's a rundown of what the treaty is, why it matters and what is still to come.