The Quest for A Faster Marathon
How big a difference does air resistance make when running a marathon? Nike tried to find out recently. A look at the science behind the 2-hour marathon.
The Science of Hot Chili Peppers
Why do spicy foods feel hot? A look at the science behind the world's spiciest hot chili peppers, including the new "Dragon's Breath" variety.
Is Human Noise Stressing Out Protected Wildlife?
A survey in the United States found that in more than half of protected areas human-caused sounds significantly increased background noise levels.
What the White House Needs to Know about Managing “Screen Time”
White House officials, like parents, are learning how limiting screen time can lead to better focus. But what does "screen time" really mean?
Medical Leeches Are Back (Yes, You Read That Right)
Leeches are especially helpful when veins are damaged and unable to properly drain blood from extremities, for example, in recently reattached amputations.
The Gender Politics Behind Why We’re “Mammals”
Linnaeus, who described most plants and animals by their male characteristics, chose to name humans and their relatives after the female breast.
Why Would NASA Want to 3-D Print Chain Mail?
NASA engineers have 3-D printed a new version of chain mail. Why strong, light, heat-resistant materials are so important in space.
The Secrets of Viking Sword Making
New research scans three Viking swords and finds that, while well-made, they were not strong enough to withstand a fight.
Secret Communities: Why We Confess Online
How can it be helpful to disclose secrets online? A look at sites like PostSecret, where users anonymously confess to things they've never told anyone.
Have Humans Been in the Americas Longer Than We Thought?
Humans may have inhabited the Americas much longer than initially suspected. But questions like who these people were remain unanswered.