Tony the Tiger, a 550-pound Siberian-Bengal mix, lives in a cage at a Louisiana truck stop.

America Has a Tiger Problem And No One’s Sure How to Solve It

No one even knows how many of the big cats are in the United States

Can the Siberian Tiger Make a Comeback?

In Russia’s Far East, an orphaned female tiger is the test case in an experimental effort to save one of the most endangered animals on earth

The International Space Station Will Soon Be Able to Measure Forest Density Using Lasers

Strengthening the planet’s forests is one critical way to combat climate change

The Wrists of Birds Reveal Evolution Undoing Itself

Contrary to earlier claims, a new study shows that evolution may be reversible

A diverse array of trilobites ruled the seas for almost 300 million years, until they vanished at the end of the Permian period.

Vinegar-Like Acid Rain May Have Fallen During Earth’s Worst Extinction

Vanilla-flavored rocks hint at a planet scoured by intense acid rain during the Great Dying 252 million years ago

A closeup of a Herculaneum papyrus scroll used in an international scanning project.

Ancient Scrolls Blackened by Vesuvius Are Readable at Last

X-ray scans can just tease out letters on the warped documents from a library at Herculaneum

Ten years ago this week, the Huygens probe gave scientists a first look at the icy surface beneath the haze of Saturn's moon Titan.

Best Space Photos of the Week

Best Space Photos of the Week: From Solar Flares to Saturn’s Moons

A spitting sun, a well-loved lake and a happy accident on Mars star in this week’s best space images

Social media may be more relaxing than anticipated.

Social Media Is Not Making You a Ball of Stress

But perhaps unsurprisingly, Facebook and Twitter can cause stress to spread when bad things happen to friends and family

The lavish displays of the Gold Souk in Dubai are a long way from deforested areas of South America, but a new study connects the two worlds.

Lust for Gold Is Consuming Precious South American Forests

Satellite images show that while the scale of deforestation is small, it is bleeding into protected areas

Researchers exhumed the mummy of Cangrande della Scala in 2004 to perform a modern autopsy on the famous Italian autocrat.

Poison Hath Been This Italian Mummy’s Untimely End

A lethal helping of foxglove seems to have triggered the downfall of a warlord of Verona

This multicolored lily pad is actually a bloom of the iron-based mineral hematite in Brazilian quartz.

Art Meets Science

Surreal Photos Reveal the Otherworldly Insides of Gemstones

If you thought gems were beautiful to the naked eye, take a look at them under a microscope

Hubble snapped this incredibly detailed view of the "Pillars of Creation" to help mark its 25th anniversary.

Top Space Pictures of the Week, From a Hubble Icon to Hungry Black Holes

Ghostly pillars, a dark nebula and a galaxy herd starred in some of the best image-driven stories released at a recent astronomy meeting

An Asian tiger mosquito in action.

New Research

Could GM Mosquitoes Pave the Way for a Tropical Virus to Spread?

Modified insects designed to stop dengue fever could make it easier for another disease-carrying species to take root

To reduce carbon dioxide emissions, the world would need to leave some 80 percent of current coal reserves in the ground, according to a new study.

Anthropocene

To Meet Global Warming Targets, Leave Fuels In the Ground

Hefty percentages of fossil fuels need to remain untapped to curtail the rising global temperature

A handful of promising drug candidates?

A New Antibiotic Found in Dirt Can Kill Drug-Resistant Bacteria

Tests in mice show that the new drug works against numerous nasty diseases and should stay viable for decades

Incredible: A Caracal Slaps Down a Bird in Flight

The caracal is a fierce and agile predator. And the way it pursues airborne prey is astounding

This artist's depiction shows a gas giant planet akin to Jupiter rising over an alien ocean.

New Super-Earths Double the Number of Life-Friendly Worlds

Three studies looking at small, rocky planets are helping astronomers figure out how common worlds like ours are in the galaxy

The world's six known punked out snail species, which have mohawk-like spikes, acidic-dyed psychedelic colors and hardcore shells that are falling apart.

New Research

New Deep-Sea Snails Are Nature’s Own Punk Rockers

The spikes on one hardcore species inspired scientists to name it after Joe Strummer of the Clash, who was also an ardent environmentalist

Dumpling squid don't let danger stop them from mating.

New Research

Threat of Being Eaten Doesn’t Deter Dumpling Squid From Sex

The adorable cephalopods seem to rate mating higher on their list of priorities than survival

As you pour your Champagne to celebrate the New Year, remember that the physics behind those bubbles has some real-world applications.

The Physics of Champagne Bubbles Could Help Power the Future

Studying the principles that govern bubble formation in sparkling wine could improve power plant boilers

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