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A close-up of a dragonfly clinging to a twig: 300 million years ago, the dragonfly-like griffinfly bug was about the size of a hawk.

Solved: How flying insects evolved from hawk-sized to tiny

Giant flying bugs once boasted massive wingspans nearing 30 inches. But 150 million years ago, they began shrinking, and now scientists think they know why

 
Lion-tailed macaques in captivity: Only 4,000 members of this endangered species remain, and most American zoos have had to phase them out.

How zoos decide which endangered species to save

With limited resources and a growing number of disappearing breeds, zoos are having to choose which animals to rescue, and which to let disappear

 
Because humans can't hear certain high-frequency sounds, there are some noises dolphins make that are unintelligible. This new speaker could help decipher them.

Could humans one day communicate with dolphins?

A new device mimics the sounds of the ocean's smartest creatures, and could one day allow human-dolphin dialogue

 
Rainy days are downers for the newly discovered Rhinopithecus strykeri monkeys, who start sneezing at the slightest drizzle.

The 10 weirdest new species of 2012

A mushroom named after SpongeBob, a sneezing monkey, and a blue tarantula top this year's list of Earth's most bizarre residents

 
Carbonemys cofrinii: The gigantic ancient turtle is illustrated chowing down on a small crocodylomorph, an ancestor to the modern crocodile.

Discovered: The ancient turtle as big as a car

The giant freshwater reptile had a head the size of a football and likely chowed down on small crocodiles

 
If we don't taper our overconsumption by 2030, not even a second planet Earth could sustain us.

Has mankind outgrown Earth?

Humans are using up the planet's resources at a frighteningly unsustainable rate, according to a new report from the World Wildlife Fund

 
A scanned electron microscopy image of an impregnated female warehouse pirate bug: The wings have been removed to reveal the mating wounds in the upper right of the abdomen area.

The violent sex life of the 'dagger penis' bug

Rather than mate through traditional means, Xylocoris flavipes uses its razor-sharp private parts to brutally impregnate females

 
Santino used a pile of hay to obscure rocks that he planned to throw at spectators who approached his pen at Sweden's Furuvik Zoo.

The chimp who learned to trick humans... and pelt them with stones

Meet Santino, a supersmart, rock-slinging ape who devises elaborate plans to annoy spectators at Sweden's Furuvik Zoo

 
Fish in the North Pacific Ocean region are estimated to ingest anywhere from 12,000 to 24,000 tons of plastic each year.

The Pacific Ocean's growing plastic problem

About 1 in 10 fish in the Pacific are found to have bits of plastic in their stomachs, and the pollution predicament is only getting worse

 
The two dolphins (not pictured) died from an overdose of the opiate Buprenorphine, which may have shut down the brain mechanism that tells dolphins when to surface for air.

The dolphins that overdosed on heroin... at a rave

Drugged-out revellers. A party on the grounds of a Swiss zoo. Result: The death of two dolphins named Shadow and Chelmers. Here's the unsettling story

 
It's estimated that massive vegetarian dinosaurs produced as much as 520 million tons of methane a year.

Did farting kill the dinosaurs?

Gassy vegetarians like the Brontosaurus may have produced so much methane that they triggered global warming, possibly hastening their extinction

 
After the conservative Heartland Institute ran this anti-climate change billboard in Chicago, the group's president said he was sorry he'd "angered and disappointed" some Heartland supporters.

Heartland's ballsy attack on climate-change theory: The fallout

A conservative think tank drafts the Unabomber for a short-lived ad attempting to chip away at the scientific consensus on man-made climate change

 
A California wind farm at sunset: According to a new study, nighttime temps in the air above wind-powered turbines in Texas were 1.3 degrees warmer than in other parts of the state.

Do wind farms actually cause climate change?

A new study suggests that green-energy-creating windmills make the air they're stirring significantly warmer

 
A newborn pygmy spiny-tailed shark with a yolk sac still attached: The smalleye pygmy shark uses its glowing belly to hide from larger predators.

The tiny shark that glows in the dark

Scientists have long been fascinated by the bioluminescent undersides of the hand-sized pygmy shark, and now they've confirmed the creature's secret

 
Jellyfish off the coast of California: Populations of the stinging creatures are increasing because of overfishing, which rids the jellies of their main competition for food.

Are jellyfish taking over the oceans?

Watch out, surfers: Populations of the translucent invertebrates — along with their nasty stings — are exploding all over the world

 
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