Neptune’s oddball moon Nereid may be the sole remnant of an earlier system, formed near the planet rather than being pulled in from afar.

Best practices, including checking public E. coli reports and keeping your head above water can keep you safe while swimming.

An ocean current called the Atlantic Meridional Overturning Circulation will weaken by 50 percent by 2100. The question is what to do about it.

Scientist Saul Justine Newman debunks high-profile longevity research and antiaging “medicine” in a new book.