2017-02-28 所属栏目:科学美国人

Head to the mountains, and if the steep trails don't slow you down, the thin air will. There's less oxygen up there—so strenuous activity can leave you dizzy, out of breath

2017-02-24 所属栏目:科学美国人

“There are sort of three main ways that our species has developed to break down foods, or process foods, in a primordial way. And that is by cooking, by fermenting foods and

2017-02-23 所属栏目:科学美国人

“So we’re inside, we’re in fake lighting, we’re not spending as much time outside in the context in which our visual system evolved.”Amanda Melin, ass

2017-02-22 所属栏目:科学美国人

Humans aren't the only species that forms friendships. Lots of animals prefer to spend their time only with certain individuals.

"It's all very well showing that you do get soc

2017-02-22 所属栏目:科学美国人

“CDC is afraid is afraid to fund firearms research.”

David Hemenway, professor of health policy at the Harvard T. H. Chan School of Public Health.

“Twenty years

2017-02-21 所属栏目:科学美国人

Time spent in zero G changes the body: Astronauts come home with bone loss and muscle weakness. But what happens in their heads? To find out, researchers examined MRI’s of as

2017-02-20 所属栏目:科学美国人

“CDC is afraid is afraid to fund firearms research.”

David Hemenway, professor of health policy at the Harvard T.H. Chan School of Public Health.

“Twenty years

2017-02-20 所属栏目:科学美国人

The Mariana Trench is the deepest spot in the world’s oceans. Only three humans have ventured into the trench in submersibles. But plenty of our pollution has made the voyage

2017-02-17 所属栏目:科学美国人

One of the most exquisite heat sensors in the world—it’s not in some government lab. It's in the head of a snake. The pit viper, to be specific.

"They're incredibly

2017-02-16 所属栏目:科学美国人

Urban development is encroaching on forests in the Pacific Northwest. And it’s also ruining Valentine’s Day for some songbirds. Because urban growth is making it a chal

2017-02-15 所属栏目:科学美国人

You've probably seen pictures of Greek villages, where every house is painted bright white. The paint reflects the intense sunlight of the Mediterranean. And it works pretty well

2017-02-14 所属栏目:科学美国人

It turns out the best looking thing on a man may be a good-looking woman.

Researchers report that women find a man they see with an attractive woman more desirable than unattache

2017-02-10 所属栏目:科学美国人

Every spring, the Mississippi River dumps tens of thousands of tons of nutrient runoff into the Gulf of Mexico. Add temperature, current and wind to that pollution, and you have th

2017-02-09 所属栏目:科学美国人

You might think frogs catch insects ‘cause their tongues are sticky. "But why is the tongue sticky, and how does it actually adhere to these insects at these very high accele

2017-02-07 所属栏目:科学美国人

Super Bowl Sunday is almost here and there’s one question on everyone’s mind: How can I tackle a plate of chicken wings without adding yardage to my end zone?

Well, Ch

2017-02-06 所属栏目:科学美国人

Last Christmas, Santa Claus must have been loading his sleigh in a t-shirt and shorts. Temperatures at the North Pole crept up toward the freezing point when they should have been

2017-02-03 所属栏目:科学美国人

The Mediterranean Sea is home to some 17,000 native species. But it's also home to a growing number of non-native species: 756 at last count. 756 may not sound like a lot, compare

2017-02-03 所属栏目:科学美国人

Once upon a time, on the big island of Hawaii, it would not have been unusual to hear:

[wild Hawaiian crow call]

That’s the call of the Hawaiian crow. It’s is a crit

2017-02-03 所属栏目:科学美国人

Hundreds of millions of years ago a humble fish swam in the lakes and rivers of the supercontinent Gondwana. Eventually Gondwana broke apart, becoming the continents we know today.

2017-02-03 所属栏目:科学美国人

LSD is one of the most potent hallucinogenic drugs—active at just around 100 micrograms…a miniscule amount. That fact has fascinated pharmacologists for decades. Namel

2017-02-03 所属栏目:科学美国人

Last time you hit the beach—and yeah, probably seems like a distant memory in the currently chilly parts of the world—did you pack sunscreen? A beach umbrella? Or both?

2017-02-03 所属栏目:科学美国人

Next time you need directions, maybe ask an ant. Because these clever little critters are such masters of navigation that some can find their way home… whether they’re

2017-01-25 所属栏目:科学美国人

I don’t believe, in all my years, I have ever seen a fruit fly I would consider obese. But, thanks to the wonders of modern science, that’s all about to change. Because

2017-01-24 所属栏目:科学美国人

Springtime is flower season. And that includes some 90 million almond trees in California. It's the largest pollination event in the U.S.—and beekeepers truck in two thirds

2017-01-22 所属栏目:科学美国人

Of the many puzzles mathematicians ponder, one is new ways to tie knots. "There are more than six billion different types of knots that have been tabulated by maOf the many puzzles