What Makes the “Lion Whisperer” Roar?

He’s famous for getting dangerously close to his fearsome charges, but what can Kevin Richardson teach us about ethical conservation—and ourselves?

At 3.3 million years old, tools unearthed at the Lomekwi 3 excavation site in Kenya, like the one pictured above, represent the oldest known evidence of stone tools, researchers suggest.

The Oldest Stone Tools Yet Discovered Are Unearthed in Kenya

3.3 million-year-old artifacts predate the human genus

The ancestor of all living snakes, depicted on the prowl in the South American forests it likely inhabited 110 million years ago, likely possessed a pair of tiny hind limbs and hunted at night.

The Mother of All Snakes Looked Surprisingly Modern

New research indicates why the slithery beast’s body appears pretty much as it did 110 million years ago

Why Do Hyenas Laugh?

Are hyenas the most misunderstood animals in the wild? They’re intelligent, have a sophisticated social order, and their famous laugh isn’t even a laugh

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Solar System Chatter

Updates from our far-flung spacecraft

Vampire Healing: Young Blood Can Mend Old Broken Bones

It’s old blood, not old bones, that makes fracture healing difficult among the elderly

Meet the Prize-Winning Spiders From the British Tarantula Society’s Annual Competition

Now in its 30th year, the arachnid-equivalent of the Westminster Dog Show showcases the strange beauty of an eight-legged obsession

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Best Space Photos of the Week

Dark Globs, a Salty Moon and More of This Week’s Stellar Wonders

Mysterious star clusters and Europa in a can feature in our picks for this week’s best space images

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Ask Smithsonian: How Many Rings Does Saturn Have?

The age, origin and purpose of Saturn’s rings have mystified scientists since the days of Galileo

Data from satellites and sensors show the Pacific Ocean conditions in March 2015, including an increase in warm waters (shown in red). The warming has strengthened since then, prompting agencies to declare 2015 an El Niño year.

Anthropocene

El Niño Is Here, But It Can’t Help Parched California (For Now)

Three national agencies have confirmed that the natural phenomenon has arrived, but not in time to bring much-needed rains in the West

An artist's vision of a brilliant quasar at the core of a young galaxy.

Think Big

Rare Quartet of Quasars Found in the Early Universe

The quirky set of extremely bright black holes challenges theories for how the cosmos reached its current structure

Anthropocene

Is This Plan to Combat Climate Change Insane or Insanely Genius?

Harvard physicist David Keith wants to use two jets and one million tons of sulfur dioxide a year to halt global warming

A trap-jaw ant opens its massive mandibles.

New Research

Watch These Ants Hurl Themselves Out of Death Traps With Their Mouths

At least one trap-jaw ant species has coopted its exceptionally strong mandibles to escape its nemesis, the ferocious antlion

A pelican dives for dinner among an unsuspecting school of fish.

Paper Turtles and Frisky Skates Bring This Indoor Seashore to Life

A new exhibit at the National Aquarium in Baltimore takes visitors on a trip to the beach and into the dark depths of the Atlantic

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Best Space Photos of the Week

A Lopsided Supernova, Orbital Espresso and More Cosmic Wonders

An exploding star reveals its secrets and an astronaut takes a coffee break in this week’s best space pictures

A person looks at profile photos on the messaging app Momo in Shanghai.

New Research

Your Online Dating Profile Picture Affects Whether People Trust You

Attractiveness is linked to trust, but the responses are very different between men and women

10 New Things Science Says About Being a Mom

Such as, how much time she spends with her child doesn’t matter as much as we think

The Cosmic Navel is larger than it appears in this image—it spans about 200 feet wide and is between 16 and 65 feet deep.

How the Giant “Cosmic Navel” Formed in Utah

The unique landform in Grand Staircase-Escalante National Monument is essentially one of the biggest potholes on Earth

In a recent ad campaign, portraits of litterers made from DNA taken from tossed cigarettes, coffee cups and condoms were posted in public places around Hong Kong.

DNA Testing Could Identify Litterbugs and Dog Poop Miscreants

Anonymous crimes may not be quite so anonymous anymore

Lightning crackles across the sky over Canyonlands National Park in Utah.

New Research

Rockets and Microphones Reveal the First Images of Thunder

The acoustic visuals could help us better understand the physical processes that drive lightning strikes

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