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Evolution

The challenges of finding fruit may have driven the evolution of bigger brains in our primate ancestors

New Research

What Really Made Primate Brains So Big?

A new study suggests that fruit, not social relationships, could be the main driver of larger brains

Bird-like versus lizard-like hips define the two major categories of dinosaurs

New Research

New Study Restructures the Dinosaur Family Tree

Detailed analysis of dino fossils suggests that Tyrannosaurus and its relatives may be on the wrong side of the tree

Nearly blind, Typhlomys cinereus thrives in the high forests of southeastern China and Vietnam—with a little help from another sense.

New Research

This Echolocating Dormouse Could Reveal the Origins of One of Nature’s Coolest Superpowers

Mice, moths and even humans use clicks and echoes to “see” the world around them

The ancient damselfly's courtship ritual was caught in amber 100 million years ago.

New Research

Flirtatious 100-Million-Year-Old Damselflies Found Frozen in Amber

Scientists are learning about how insects evolved from their ancient come-hither dance

From the same DNA, different genders can boast dramatically different characteristics. Dung beetles are helping scientists understand how.

New Research

What Dung Beetles Can Teach Us About Sexual Difference

When it comes to sex appeal, it’s not all in your genes (it’s also in your proteins!)

How did the sabertooth cat wield its excess of tooth?

How Did Sabercats Use Those Outlandish Fangs?

We’ve barely scratched the surface of how this charismatic cat utilized its dental cutlery

False-color x-ray of the purported 1.6 billion-year-old red algae

New Research

At 1.6 Billion Years Old, These Fossils Could Be the Oldest Complex Life

Three types of ancient red algae-like fossils captivate scientists, but many questions remain

New research strengthens the theory that different climates influenced the shape of the human nose.

New Research

How Climate Helped Shape Your Nose

New research shows how the width of our nasal passages is literally shaped by the air we breathe

Ecologists tend to think of mobbing behavior as primarily a way that smaller birds protect their nests and chicks from larger predators. Shown here, a Willie wagtail attacking an Australian raven.

New Research

Why Do Male Birds Take on Larger Predators? Maybe Just to Impress the Ladies

Some mobbing behavior may be less about survival, and more about sexual selection

Itchy and scratchy: When they see their peers scratching away, mice get the urge to itch.

New Research

Why Is Itching So Contagious?

Scientists figure out how compulsive scratching spreads in mice, and maybe humans

Paleo diet? Not so much. Thanks to Neanderthal dental plaque, researchers are getting a much better idea of what our ancestors actually dined on.

New Research

Scientists Delve Into Neanderthal Dental Plaque to Understand How They Lived and Ate

The plaque that coated Neanderthal teeth is shedding new light on how our ancestors ate, self-medicated and interacted with humans

While excavating at Bluefish Caves in northern Yukon during the 1970s and 1980s, Canadian archaeologist Cinq-Mars found cut-marked horse bones and other traces of human hunters that seemed to date to 24,000 years ago—thousands of years before the Clovis people.

What Happens When an Archaeologist Challenges Mainstream Scientific Thinking?

The story of Jacques Cinq-Mars and the Bluefish Caves shows how toxic atmosphere can poison scientific progress

These skull fragments have features that seem to combine human and Neanderthal traits.

New Research

Scientists Think These Skulls May Be New Human Ancestor

Two fossils combine early human, Neanderthal features

During more peaceful times, two female baboons sit next to a collared male baboon holding an infant.

New Research

Baboons Are Ruthless Reproducers

These monkeys do whatever it takes to pass on their genes, including killing others’ offspring

The best defense is a good offense.

New Research

The Real Reason the Turtle Learned to Hide its Head Will Surprise You

Turtles retract their heads for protection, but new research suggests that ability evolved for an entirely different reason

Thanks to this evolutionary novelty, a flexible joint in the skull of dragonfishes, the creatures are able to swallow prey that is almost as big as they are.

This Hinged Skull Helps Dragonfish Eat Prey Bigger Than Its Head

Scientists have discovered the world’s only group of fish that has this unbelievable ability

The woolly arctic moth caterpillar produces alcohols that allow it to avoid freezing at temperatures reaching -70 degrees F.

Ask Smithsonian 2017

What Do Insects Do in Winter?

When winter comes, most bugs either migrate or time travel. But some get far more creative

Gotcha! A frog's tongue can be five times faster than the blink of a human eye.

New Research

Inside Every Frog’s Mouth Is a Sticky, Grabby Bullet

Investigating frog tongues—and some human ones!—in the name of science

An artist's recreation of what the ancient creature looked like.

Bag-Like, Big-Mouthed Sea Creature Could Be Earliest Human Ancestor

This minute wriggly sea blob could represent some of the earliest steps along the path of evolution

Victorian mores influenced ideas not just about men and women but animals too.

How Victorian Gender Norms Shaped the Way We Think About Animal Sex

No, females aren’t always choosy and males don’t always get around

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