Latest articles by Charles Choi
Neanderthals, modern humans and a mysterious human lineage mingled in caves in ancient Israel, study finds
A newly excavated cave in Israel holds burials and artifacts suggesting that multiple human species commingled and shared ideas there during the Paleolithic.
1.4 million-year-old jaw that was 'a bit weird for Homo' turns out to be from never-before-seen human relative
The newfound species belongs to the genus Paranthropus, whose nickname is "nutcracker man."
How do Hula-Hoops work?
How do Hula-Hoops keep from falling down as we twirl them around?
Why do bats hang upside down to sleep?
Bats often hang upside down when they sleep instead of sitting right side up or lying down — why?
How does arsenic kill?
Arsenic is a naturally occurring element with properties similar to those found in phosphorus. It is also a deadly toxin that is difficult to detect.
No Descendants Are Left from the First Eskimos
A new study of human DNA -- and the largest genetics study yet of ancient peoples -- reveals that the Paleo-Eskimos are genetically distinct from both the Neo-Eskimos and modern Native Americans.
Probiotics May Help Prevent Peanut Allergies, Animal Study Shows
Certain types of gut bacteria could ward off food allergies, according to a new study in mice.
Computer Games Better Than Medication in Treating Elderly Depression
Older people with depression may benefit more from playing computer games aimed at improving their thinking skills than from taking an antidepressant drug, a new study suggests.
How Mysterious Natural Arches Form
Rock formations such as arches, pillars, and pedestal can look as though they defy gravity. But new research how such amazing rock formations take shape.
Natural Arm Swing Saves Runners' Energy
Runners actually save energy by swinging their arms when they run, a new study finds. Runners burn more calories when the arms are held still.
World's Biggest Fish Seek New Home
Whale sharks -- the world's largest fish -- are appearing more frequently near the Azores islands, due to climate change, a new study finds.
Bizarre Dinosaur Had 4 'Wings,' Long Tail Feathers
Changyuraptor had long feathers on both its forelimbs and its hind limbs, giving it the appearance of having four wings, researchers say.
New 'Supercooling' Technique Helps Preserve Organs
Liver transplants could get a boost from a new technique that could allow the organs to be stored for longer before they are transplanted into patients.
New Test Spots Malformed Proteins Linked to Mad Cow Disease
The human form of mad cow disease could be detected early on with an experimental blood test that looks for the misfolded proteins linked with it, researchers say.
