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A Large Body of Water on Mars Is Detected, Raising the Potential for Alien Life

A Large Body of Water on Mars Is Detected, Raising the Potential for Alien Life

An artist’s rendering of the European Space Agency’s Mars Express spacecraft searching the planet’s south pole for liquid water.

A Massacre Frozen in Time: Skeletons in Sweden Reveal Ancient Attack

A Massacre Frozen in Time: Skeletons in Sweden Reveal Ancient Attack

Remains of victims found by archaeologists, who determined the villagers were slaughtered in their homes on the island of Öland in the Baltic Sea.

Some Birds Are Better Off With Weak Immune Systems

Some Birds Are Better Off With Weak Immune Systems

The tree pipit migrates to and from Africa and Europe each year.

Falcon Heavy, in a Roar of Thunder, Carries SpaceX’s Ambition Into Orbit

Falcon Heavy, in a Roar of Thunder, Carries SpaceX’s Ambition Into Orbit

The success of this launch gives SpaceX momentum to begin developing even larger rockets, which could help fulfill Elon Musk’s dream of sending people to Mars.

Review: ‘Pit Bull’ Traces Path From Fighter to Pet to Demon

Review: ‘Pit Bull’ Traces Path From Fighter to Pet to Demon

Pit Bull: The Battle Over an American Icon by Bronwen Dickey
Knopf, $26.95
330 pages

The Lost Dogs of the Americas

The Lost Dogs of the Americas

A 10,000-year-old dog from an archaeological site near Eldred, Ill., known as the Koster site, where the earliest known dogs in the Americas were found.

In Footprints on Scotland’s Isle of Skye, Signs of a Dinosaur Playground

In Footprints on Scotland’s Isle of Skye, Signs of a Dinosaur Playground

A sauropod footprint found in Scotland was among several that included tracks left by smaller, two-legged meat-eaters. Their presence together upends a theory that the larger plant-eaters waded into shallow, muddy waters to evade predators.

Asteroids and Adversaries: Challenging What NASA Knows About Space Rocks

Asteroids and Adversaries: Challenging What NASA Knows About Space Rocks

Radar images of a near-Earth asteroid collected in 2015. Since 2011, a NASA project called Neowise has studied 158,000 asteroids. But Microsoft’s former chief technologist, Dr. Nathan P. Myhrvold, criticized those numbers. “The science is terrible,” he said.

Owls See the World Much Like We Do

Owls See the World Much Like We Do

Even though barn owls have simple brains, a new study suggests they can visually process objects in ways similar to that of animals with more sophisticated perception.

In Cave in Israel, Scientists Find Jawbone Fossil From Oldest Modern Human Out of Africa

In Cave in Israel, Scientists Find Jawbone Fossil From Oldest Modern Human Out of Africa

A fossilized human jawbone discovered in Israel. The find may suggest that Homo sapiens first migrated out of Africa at least 50,000 years earlier than previously thought.

Ships Unearthed in Virginia Offer Glimpse of Colonial Era

Ships Unearthed in Virginia Offer Glimpse of Colonial Era

An 18th-century ship was discovered last month in Old Town Alexandria, Va., the fourth discovered in recent years within a two-block radius.

Science Tools Anyone Can Afford

Science Tools Anyone Can Afford

Manu Prakash with his mother, center, in India, where it was not long before he began showing an appetite for science.

Being Antisocial Leads to a Longer Life. For Marmots.

Being Antisocial Leads to a Longer Life. For Marmots.

Marmot pups near Crested Butte, Colo. Researchers tracked yellow-bellied marmots’ interactions for 13 years and found that more solitary marmots lived longer lives.

U.F.O.s: Is This All There Is?

U.F.O.s: Is This All There Is?

A U.F.O. in New Mexico in 1957. For astronomers, the biggest problem with alien visitation is not the occasional claim of mysterious light in the sky, but the fact that we’re not constantly overwhelmed with them.

Why Scientists Are Battling Over Pleasure

Why Scientists Are Battling Over Pleasure

Is the pleasure of enjoying a Leonardo da Vinci painting really any different than the pleasure we get from eating chocolate?


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