What Makes A Leader?
Leaders make decisions for a group in the same way they make choices for themselves, a study suggests. They don't change their decision-making behavior, even when the welfare of others is at stake.
Humans
2017 Was One Of The Hottest Years On Record
Greenhouse gas concentrations reached a record high. Global sea level was the highest on record, too. NOAA's State of the Climate report points to the urgency of addressing climate change.
WATCH: The Science Behind Why Some Bullets Are More Destructive Than Others
How much damage a bullet does when fired at the human body hinges on physics. Our latest "Let's Talk" video shows and explains why certain types of ammunition cause greater havoc than others.
For Many College Students, Hunger 'Makes It Hard To Focus'
With rising school costs, as many as half of U.S. college students are feeling so stretched financially that they either aren't getting enough to eat or they're worried about it, studies find.
Off Your Mental Game? You Could Be Mildly Dehydrated
Dehydration has long been known to slow physical performance. Now there's evidence that too little water can hurt cognitive performance, too, making complex thinking tasks harder.
Zachary Wood: Why Should We Listen To Views We Find Offensive?
In college, Zachary Wood joined a group that invites provocative speakers to campus, hoping to spark dialogue. But he soon learned not everyone wants to hear from those with whom they disagree.
Elif Shafak: What Happens When Different Viewpoints Are Silenced?
Turkish novelist Elif Shafak has seen firsthand what can happen when a country restricts free speech. She says democracy depends on the right to openly exchange diverse, even oppositional, ideas.
James Kirchick: Who Benefits From Unrestricted Free Speech?
When James Kirchick was in college, someone he found deeply offensive spoke on campus. Rather than protest, James attended the talk. He says free speech benefits everyone, especially the powerless.
How The Brain Helps You Sing Or Say What You Mean
The richness of human vocal communication turns partly on our ability to control pitch, scientists say. Consider the difference you hear between "Let's eat, Grandma" and "Let's eat Grandma."
Which Water Is Best For Health? Hint: Don't Discount The Tap
Scientists weigh in on whether Americans really need to pay for alkalinized, mineralized, or purified water from filters or bottles.