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Some Songbirds Have Brains Specially Designed to Find Mates for Life

Some Songbirds Have Brains Specially Designed to Find Mates for Life

An assortment of zebra finches studied by Sarah Woolley, a neuroscientist at Columbia University. Dr. Woolley found that finches were expert at learning the songs of their fathers for later in life, when it comes time to find a mate.

With 86% Drop, California’s Monarch Butterfly Population Hits Record Low

With 86% Drop, California’s Monarch Butterfly Population Hits Record Low

The population of western monarch butterflies in California dropped to a record low last year, according to a nonprofit conservation group.

Rhino Embryos Made in Lab to Save Nearly Extinct Subspecies

Rhino Embryos Made in Lab to Save Nearly Extinct Subspecies

Sudan, the last male northern white rhino, who died in March.

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.

The Cuttlefish, a Master of Camouflage, Reveals a New Trick

The Cuttlefish, a Master of Camouflage, Reveals a New Trick

Two images of the same cuttlefish, taken fewer than two seconds apart, showing how quickly it can change color.

Frog-Killing Fungus Found to Have Origins on Korean Peninsula

Frog-Killing Fungus Found to Have Origins on Korean Peninsula

An Oriental fire-bellied toad, which was imported into Europe from South Korea.

Summer Solstice 2019: The Search for Life in the Galaxy

Summer Solstice 2019: The Search for Life in the Galaxy

An artist’s rendering of an Earthlike exoplanet orbiting another. Scientists haven’t been able to measure an exoplanet’s tilt yet, but some suspect that a planet’s tilt is key to supporting life.

The Rational Choices of Crack Addicts

The Rational Choices of Crack Addicts

Carl Hart, an associate professor at Columbia University, is the author of the book “High Price,” a mix of memoir and scientific research about drug addiction.

Spiderlike Creature With a Scorpion’s Tail Is Found Trapped in Amber

Spiderlike Creature With a Scorpion’s Tail Is Found Trapped in Amber

A specimen of the Chimerarachne yingi, an ancient relative of spiders that had a long, whip-like tail that was probably used as a sensory organ.

Newly Discovered ‘Limb Pit’ Reveals Civil War Surgeons’ Bitter Choices

Newly Discovered ‘Limb Pit’ Reveals Civil War Surgeons’ Bitter Choices

A field technician excavating the remains of an amputated limb at Manassas National Battlefield Park in October 2015. The discovery of two nearly complete sets of soldiers’ remains, 11 partial limbs and other artifacts appeared to date to the Second Battle of Bull Run, which ended Aug. 30, 1862.

Every 202,500 Years, Earth Wanders in a New Direction

Every 202,500 Years, Earth Wanders in a New Direction

Earth’s gravitational interactions with other planets — particularly Venus, because it is very near — affect the shape of its orbit.

Boulder-Size Clues to How Humans Settled the Americas

Boulder-Size Clues to How Humans Settled the Americas

Alia Lesnek, left, and Charlotte Lindqvist of the University at Buffalo, observing boulders on Dall Island in Alaska. Scientists have found evidence in Alaska’s rocks that the first people to populate the Americas were island-hopping sea-farers.

NASA’s New Horizons Takes Photos of Ultima Thule, 4 Billion Miles Away

NASA’s New Horizons Takes Photos of Ultima Thule, 4 Billion Miles Away

S. Alan Stern, center, New Horizons’ principal investigator, surrounded by children at Johns Hopkins University Applied Physics Laboratory in Laurel, Md., on Tuesday.

Bird’s Extinction Is Tied to the Arrival of Humans

Bird’s Extinction Is Tied to the Arrival of Humans

There were nine species of the flightless birds called the moa.

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.

What Makes Some Hair Curly? Not Quite What Scientists Thought

What Makes Some Hair Curly? Not Quite What Scientists Thought

Merino sheep on a farm in Alexandra, New Zealand. Scientists found that differences in the cells on a hair explain a sheep’s curls, and may offer insights for other mammals, like us.


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