These devices measure blood oxygen levels and can help identify when patients are dangerously ill. But research shows they can deliver misleading results for people with darker skin.
On Monday and Tuesday, the sun will set between New York's skyscrapers — offering a perfect photo opportunity and a chance to marvel at the city planning that made Manhattanhenge possible.
Botanists have discovered a new giant water lily with lily pads that can grow to nearly 10 feet wide. Researchers previously thought there were only two species of giant water lilies.
Are we alone in the universe? This hour, we travel the cosmos with TED science curator David Biello in search of extraterrestrial life, uncovering how it may look and how we'll know we've found it.
Emergency contraceptives and abortion pills are not the same thing, though people often confuse them. Now that Roe v. Wade has been overturned, it's vital to know the difference — and your options.