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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.

New Wearable Sensor Can Collect Data From Sweat

New Wearable Sensor Can Collect Data From Sweat

Jo-Wilfried Tsonga of France wiped sweat from his face during the Australian Open. Researchers say their new wearable sensor can measure perspiration for conditions like dehydration and fatigue.

3.6 Degrees of Uncertainty

3.6 Degrees of Uncertainty

Icebergs near Greenland's glaciers, which are speeding up as the climate warms.

Do Bees Know Nothing?

Do Bees Know Nothing?

Not only can a honey bee count, it understands the concept of zero, according to researchers.

The Final Hours of the Iceman’s Tools

The Final Hours of the Iceman’s Tools

A showcase reflects a reconstruction of Ötzi’s skull, center, and his body at the South Tyrol Museum of Archaeology in Bolzano, Italy.

The Very First Animal Appeared Amid an Explosion of DNA

The Very First Animal Appeared Amid an Explosion of DNA

Creatures as diverse as the humpback whale and the ladybug all descend from the very first animal, which appeared hundreds of millions of years ago.

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.

When a Pregnant Pipefish Dad Spots an Alluring Female, Things Get Weird

When a Pregnant Pipefish Dad Spots an Alluring Female, Things Get Weird

A robust ghost pipefish in waters off Indonesia. With some species of pipefish, fathers are susceptible to what scientists call the Bruce effect.

Empathy May Be Overrated in an Election, and in a Leader

Empathy May Be Overrated in an Election, and in a Leader

Top: Donald J. Trump; Middle: Bill Clinton: Bottom: George H.W. Bush.

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.

A Chinese Space Station Will Fall to Earth Soon. You’ll Probably Be Fine.

A Chinese Space Station Will Fall to Earth Soon. You’ll Probably Be Fine.

A spokeswoman for China’s manned space program presented a replica of the Tiangong 1 space station (left half of the model) in 2012 with a manned spacecraft, Shenzhou 9, attached.

Vanishing in the Wild, These Salamanders Found Refuge in a Convent

Vanishing in the Wild, These Salamanders Found Refuge in a Convent

Sister Ofelia Morales Francisco, left, and Sister Rosa Cortez in the Convento Maria Inmaculada de La Salud in Mexico. The nuns make a cough syrup, in the bottle at right, from achoques, a type of salamander vanishing from nearby Lake Patzcuaro.

Arctic Foxes on a Swedish Mountain Turned ‘Blue.’ It Was a Good Thing.

Arctic Foxes on a Swedish Mountain Turned ‘Blue.’ It Was a Good Thing.

An arctic fox near Helagsfjället mountain in Sweden. Foxes in the area were severely inbred until three males from a Norwegian captive breeding population turned up.

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.


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