Some recent studies in synthetic biology, they say, raise new questions about the ethical limits of creating entities that might feel pain or resemble human embryos — or mimic humans in other ways.
Using gold, silicone and heart cells from a rat, scientists have made a tiny artificial stingray. The engineering involved in propelling it could help make a heart that's more than a mechanical pump.
A man shows up in the emergency room with a speedy, irregular heartbeat, but can't say when it first went awry. No problem. The ER doctors just checked the phone records of his fitness tracker.
Ben Lecomte wants to be the first person to swim across the Pacific Ocean — a 5,500-mile journey. Doctors will monitor his heart remotely to see how intensive exercise affects this vital muscle.
Twitter changed its "favorite" icon from a yellow star to a red heart. Twitter users aren't loving it, but NPR's social science correspondent Shankar Vedantam predicts it's just a matter of time.
More than 23,000 Americans end up in emergency rooms each year after taking dietary supplements, an analysis shows. Most cases are linked to weight-loss products or energy-boosting supplements.
Good CPR requires 100 to 120 chest compressions per minute. If you go too fast or too slow it's not as effective. Researchers say using a metronome helps medical providers maintain the right pace.
