The view south from Viking 2, one of two probes sent to investigate the surface of the planet Mars for the first time, September 6, 1976

We Might Have Accidentally Killed the Only Life We Ever Found on Mars Nearly 50 Years Ago

In one experiment, the Viking landers added water to Martian soil samples. That might have been a very bad idea.
Five diagrams of the surface of the moon, during its phases. Aquatint after Galileo Galilei

1610: Dawn of the Extraterrestrial

Galileo's telescopic view of the Moon sparked a giant transformation in the way human beings thought about the natural world.
Grand Canyon below rim, 1964

When the Government Tried to Flood the Grand Canyon

In the 1960s, the government proposed the construction of two dams in the Grand Canyon, potentially flooding much of Grand Canyon National Park.

How Rocks and Minerals Play with Light to Produce Breathtaking Colors

Rocks and minerals don’t simply reflect light. They play with it and interact with light as both a wave and a particle.
Aerial view of a mangrove forest, a natural carbon sink

Should Environmental Policy Commodify Nature?

The White House is calling for the integration of natural capital accounting frameworks into land-use decisions, putting nature on the balance sheet.
soldier using tablet computer hands closeup pnk background pixelated neural network concept

As Militaries Adopt AI, Hype Becomes a Weapon

Few things provoke quite the same amount of anxiety as the effect AI could have on warfare.
The BADGER explosion on April 18, 1953, as part of Operation Upshot-Knothole, at the Nevada Test Site.

How Strong of a Nuclear Bomb Could Humans Make?

The biggest nuclear blast in history came courtesy of Tsar Bomba. We could make something at least 100 times more powerful.
A typical long-horn Texas Steer

Longhorns Long Gone (And Returned)

The end of the era of so-called Texas Longhorns doesn’t seem to have been sentimentalized at the time. Why do we wax nostalgic about it now?
Posterised, Pop art, Grunge effect City Skyline, Buildings, urban, climate change

Climate Justice in the Anthropocene: An Introductory Reading List

Justice discourse in the Anthropocene has shown us that perhaps we aren't as homogeneous of an “Anthros” as we’d expect.
A black and white newspaper advertisement titled The Abortion Handbook. Lana Clarke Phelan and Patricia Maginnis are names listed below the title.

When San Francisco Feminists Rated Mexican Abortions

The California activists played the role of a health agency to ensure women received safe and competent health care in Mexican clinics.