Pulsating remnants of stars hint at a clump of invisible matter thought to be about 10 million times the sun’s mass.
Researchers are using X-rays to discover invisible markings left on ancient parchment containing information from the Greek astronomer Hipparchus.
Polar bears can struggle to adapt to climate change. Bears on Svalbard may be surviving on land prey and seals — but scientists warn it may not last.
New research challenges the view that human life span depends mostly on lifestyle. Genes may account for half the factors that determine longevity.
Humpback whales are teaching each other a feeding technique called bubble netting, and it's helping a Canadian population recover from whaling.
A new artificial lung system might keep people without lungs alive for weeks. Like real lungs, tubes and pumps oxygenate blood and maintain blood flow.
Thinking positive increased a specific brain region's activity and might have heightened immune response after a shot.