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NASA astronaut Christina Koch (left) poses for a portrait with fellow Expedition 61 Flight Engineer Jessica Meir of NASA who is inside a U.S. spacesuit for a fit check for a spacewalk on Oct. 18, 2019. It will be the first all-female spacewalk in history.

The 1st All-Female Spacewalk Happening Today. Here's How to Watch It Live

By Mike Wall

NASA astronauts Christina Koch and Jessica Meir are scheduled to begin the first-ever all-female spacewalk today (Oct. 18) at around 7:50 a.m. EDT (1150 GMT). Watch it live at Space.com.

An artist's depiction of simulations used in the research.

The Milky Way Stole Its Cosmic Neighbors from Another Galaxy

By Elizabeth Howell

Our home galaxy stole several dwarf galaxies that used to belong to the Large Magellanic Cloud (LMC), a galaxy near the Milky Way.

Greenland ice sheet.

What Is the Cryosphere?

By Mark Serreze

The cryosphere is critical to Earth and its inhabitants, but it is vanishing as the planet warms.

A doctor holding a lung X-ray.

Vaping Outbreak Death Toll Reaches 33

By Rachael Rettner

Nearly three dozen people have died from vaping-related lung illnesses as the nationwide outbreak that continues to grow.

A close-up view of the wingtip ESM sensors, or electronic support measures, on a U.S. Navy E-6A Mercury aircraft. To create the E-6B, Boeing modified the E-6A, adding various specialized equipment.

This 'Doomsday' Plane Was Designed to Survive a Nuclear Attack. A Bird Just Took It Down.

By Jeanna Bryner

This Navy craft is meant to communicate with nuclear forces in the event of a nuclear war. And a bird strike just grounded it.

ebola virus

Japan Just Imported Ebola to Prep for Possible Olympic Outbreak

By Nicoletta Lanese

Japan imported Ebola and other lethal viruses to prepare diagnostic test kits for the 2020 Olympics.

Red represents record-warmest temperatures. That's a lot of red.

Scorching Hot Take: September Was North America's Warmest Ever

By Mindy Weisberger

September tied the record for the warmest average global temperatures during that month, according to a new NOAA report.

Virgin Galactic's Sir Richard Branson models the new line of "spacewear" created in partnership with Under Armour.

Virgin Galactic Unveils New Line of Under Armour 'Spacewear' for Space Tourists

By Tariq Malik

Virgin Galactic and partner Under Armour unveiled a new line of "spacewear" spacesuits for future passengers on SpaceShipTwo.

The reptile's long tail is visible, but most of the crocodile's body is hidden under the bulk of the elephant that crushed it to death.

Dead Elephant Found Lying on Top of a Squashed Crocodile. What Happened?

By Mindy Weisberger

An elephant's seemingly final act after it was attacked by a crocodile was to collapse on top of the reptile, crushing the would-be predator.

Fossilized trilobites in a queue.

Ancient 'Cockroaches of the Sea' Fossilized While Playing 'Follow the Leader'

By Stephanie Pappas

Trilobites fossilized in Morocco seem to have been buried by a storm as they marched in an orderly queue.

A satellite image of the Bogoslof Volcano shows volcanic clouds after a 2017 eruption.

Underwater Volcano Creates Bubbles More Than a Quarter-Mile Across

By Yasemin Saplakoglu

In the early 20th century, sailors near Alaska reported seeing black bubbles seeming to boil out from the sea. They weren't wrong.

Artist impression of W2246-0526, the most luminous known galaxy, and three companion galaxies.

The 15 Weirdest Galaxies in Our Universe

By Stephanie Pappas

Capuchin monkey

Game Over: These Monkeys Just Crushed Humans on a Computer Game

By Nicoletta Lanese

While playing a game, monkeys switched strategies each round, while humans stuck to a set of inefficient rules.

Asteroid Breaking Apart

An Asteroid-Smashing Star Ground a Giant Rock to Bits and Covered Itself in the Remains

By Rafi Letzter

Good news for scientists. Bad news for any asteroid dwellers.

A man's tongue was missing "papillae," or the small bumps on the tongue that often contain taste buds (A). After treatment, the man's tongue returned to normal (B).

Why Did This Man's Taste Buds Disappear?

By Rachael Rettner

A man's missing taste buds would turn out to be a sign of an underlying blood condition.

Amelia Earhart photographed sitting in the cockpit of the Lockheed Electra airplane around 1936.

The Man Who Found the Titanic Just Ended His Search for Amelia Earhart's Lost Plane

By Yasemin Saplakoglu

Two weeks and a multimillion-dollar search later, Robert Ballard said he has found no hint of it.

Circles of bubbles trap tiny sea creatures that humpback whales eat.

Watch Rare Footage of Whales Blowing 'Bubble Nets' to Capture Prey in a Vortex of Doom

By Mindy Weisberger

Underwater and airborne cameras recently captured an astounding sight: feeding whales producing bubble nets to trap their prey.

An artist's depiction of the planet 51 Pegasi b orbiting its star.

How the Nobel Prize-Winning Exoplanet Was Found

By Paul Sutter

The 1995 discovery showed that the sun isn't the only star to host a family of planets — something we had long figured but never demonstrated — and also that the universe is really, really weird.

A cyborg may look conscious, but is it?

Why Computers Will Never Be Truly Conscious

By Subhash Kak

Here's why computers will never be truly conscious.

Milkmaid shipwreck

17th-Century Dutch Smugglers' Shipwreck Comes to Life in Virtual Reality

By Mindy Weisberger

A virtual dive of a 17th-century shipwreck explores the remains of a ship used by the Dutch to secretly trade with Iceland.