Italy’s longest river, fed by melt from the Alps, dries up, threatening agricultural collapse

Chinese cave explorers discovered a 630-foot-deep sinkhole containing a massive ancient forest

‘Ghost’ fossils reveal tiny organisms that survived ancient ocean warming events

Chile’s desert town built on mummies

What the UFO Discussion Really Needs

Tonga volcano blasted winds to the edge of space

Mystery issue experienced on NASA’s Voyager 1 probe from 1977

Boeing is trying again to launch its Starliner capsule to the space station — here’s what’s at stake

Astronauts may one day drink water from ancient moon volcanoes

On this day in 1984 Michael Larson pressed his luck

Mind-Altering Parasite May Make Infected People More Attractive, Study Suggests

This Space Rock’s Weird Chemistry Suggests It Came From a Supernova

How Should We Teach American History?

Gallery: A Look Inside the Defining Era of 1950s Las Vegas

‘There are no words for the horror: the story of my madness’

The US Army Planned a Nuclear Version of Its Already Crazy Off-Road Land Train

Ancient Molar Found in Laos Could Help Fill in a Gap in Human History

Congress’ first public hearing on UFOs in half a century has spurred a slew of questions

Extinction obituary: the sudden, sad disappearance of the Christmas Island forest skink

Desperate Lawmakers Discuss Piping Ocean Water to Fill Great Salt Lake

‘Why aren’t they solving this?’: Nieces continue to look for answers 60 years after Saskatoon nurse’s death

How Complex Is a Knot? New Proof Reveals Ranking System That Works

First Patient Dosed With Experimental Cancer-Killing Virus in New Trial

No, Researchers Have Not Pinpointed the Cause of SIDS

Solar power at night? New study suggests it may be possible

Russian soldier pleads guilty in first war crimes trial of Ukraine conflict

How a quick-thinking doctor with a drill saved a man’s life

Our majestic Milky Way stars in annual astrophotography competition

The simple act of spreading rock dust on farms is an overlooked but tantalizing climate solution

Artificial Lives: On the Occult Origins of Chemistry and the Stuff of Life

New problem at San Francisco’s still-sinking Millennium Tower means it may be forever tilting

Astronomers Discover Mysterious Circular Ring – Likely of Intergalactic Origin

Video: Correspondent Miles O’Brien on transportation [54:39]

We’ve All Seen the TV Shows, But What Does a Forensic Anthropologist Really Do?

Fecal Transplants Reverse Hallmarks of Aging in the Gut, Eyes, and Brain

The Man Who Controls Computers With His Mind

Are we looking for extraterrestrial intelligence all wrong?

A race is afoot to make billions from the Moon’s resources. Here’s the story so far

NASA’s Mars InSight Lander Is Getting Ready to Die

Chien-Shiung Wu’s work defied the laws of physics

Can gravity batteries solve our energy storage problems?

Gallery: Scenes From Svalbard

Drug smuggling tunnel with rail system uncovered on US-Mexico border

There’s a “Secret Society” in the Pentagon Hiding UFO Secrets, Officials Say

The Internet Origin Story You Know Is Wrong

NASA’s Artemis Moon Landing Program: Launches, Timeline, and More

Could video games be making kids smarter? A new study says yes

What Is Time?

On this day in 1899 Nikola Tesla arrived in Colorado Springs to conduct wireless electricity experiments

Who owns Einstein? The battle for the world’s most famous face

Emily Bingham on the Material Culture of White America’s Song to Itself: “My Old Kentucky Home”

Cosmic Rays can Help Keep the World’s Clocks in Sync

Perseverance: Nasa rover begins key drive to find life on Mars

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Why Do Creepy Dolls Keep Washing Up on Texas Beaches?

Cats Actually Know Each Other’s Names, Study Suggests

Video: How Brownian Motion Helped Prove the Existence of Atoms [10:07]

Humans have big plans for mining in space – but there are many things holding us back

New Video Shows Helicopter Catching Rocket Booster in Midair

Scientists create algae computer powered by photosynthesis