The Louisiana Purchase was a bargain. But it came at a great human cost.

This massive exoplanet is the ‘king’ of its solar system

Here’s what NASA’s Mars helicopter will look like when it makes history with the first extraterrestrial powered flight

We Aren’t Selfish After All

Common Sense Comes to Computers

Can Genetic Engineering Bring Back the American Chestnut?

Video: How Climate Change Is Creating More Space Junk [5:04]

Hurricanes are shaping lizard feet all over the world

National Parks Are Empty During the Pandemic — and Wildlife Are Loving It

The First International Hydrogen Supply Chain Is a Big Deal

Why It’s So Hard to Legalize Recreational Drugs

Vibrating Clothes Could Alter the Perception of Your Own Body

As states weigh human lives versus the economy, history suggests the economy often wins

Ancient ‘crazy beast’ from Madagascar had mismatched body and teeth from ‘outer space’

The Valentine’s Day snake puzzle

Bizarre Spinosaurus makes history as first known swimming dinosaur

For Some Holocaust Survivors, Even Liberation Was Dehumanizing

Pentagon UFO Videos

Video: The dark history of IQ tests [6:10]

You Can’t Stop Touching Your Face Because You’re Subconsciously Sniffing Your Hands

The Ghost Airline That Has Linked Cairo and Tel Aviv for Decades

The Massive Ice Avalanches of Mars

Scientists create glowing plants using mushroom genes

NASA CubeSat Will Shine a Laser Light on the Moon’s Darkest Craters

Video: A spy hummingbird ventures into the heart of a breathtaking monarch butterfly swarm [3:07]

Hubble captures crumbling comet in two striking shots

‘Dating a Billionaire Seemed Like Fun Until I Tried It’

Why the FBI Almost Shut Down the Unabomber Investigation Before He Was Caught

Amateur Radio Sleuth Rediscovers a Cold War-Era ‘Zombie Satellite’

‘What I Learned Speaking to Fidel Castro’s Personal Chef’

The Man Who Thought Too Fast

Dutch researchers coax secrets from Girl with a Pearl Earring

Why NASA plans to slam the DART spacecraft into an asteroid

He Found One of Stalin’s Mass Graves. Now He’s in Jail.

Deep caves are a rich source of dinosaur prints for this paleontologist

New findings suggest laws of nature ‘downright weird,’ not as constant as previously thought

What made these Forgotten Ancients build Glorious Cities only to Burn Them Every 60 Years?

Digging Up Regolith: Why Mining the Moon Seems More Possible Than Ever

A Brain Implant Restored This Man’s Motion and Sense of Touch

Man Killed by Falling Meteorite (in 1888)

This Australian Bartender Found an ATM Glitch and Blew $1.6 Million

Gallery: 26 Hours on a Saharan Freight Train

Video: And Now for Something Soothing… “As Above” by Roman Hill [06:12]

New Seismic Map of North America Reveals a Continent Under Tremendous Stress

A puzzling past sea level rise might have its missing piece

The Eruption Of Instagram Island

How the Agendas of Elites Influenced the Design of the Red Cross Registration System

Are community currencies a better way to shop?

‘Help! I Think I’m Falling in Love Over Zoom’

Why Is the Universe Expanding So Fast?

How the Deep Sea Squid Communicates in Fascinating and Flashy Ways

Spectacular Libraries You Can Explore From Your Living Room

The floral fabric that was banned

Pompeii ruins show that the Romans invented recycling

Video: Movie Poster Expert Explains Color Schemes [10:38]

Ask Ethan: Is Antimatter Sticky?

Will justice finally be done for Emmett Till? Family hope a 65-year wait may soon be over

The Bigamist’s Daughter

The Wisdom of Third Molar Removal

Black hole bends escaping light ‘like a boomerang’