Some of these massive beasts are familiar in form but enormous in size, while others are strange hybrids of modern-day animals.

New study from Australia suggests resurrection of extinct species could lead to a loss in overall biodiversity.

The sun, like many stars, may be a binary, meaning it could have a mass-extinction-causing 'brother.'

The Jambato harlequin frog had been feared extinct for at least the last 30 years.

At least five similar die-offs have happened before, but this is the first in human history — and the first with human help.

The giant bug, Lord Howe Island stick insect, was rediscovered in the early 2000s, and now scientists have confirmed it's in fact them.

Vaderlimulus tricki is the first horseshoe crab found in Idaho rocks of the Triassic Period, and it has an uncanny resemblance to Darth Vader.

Ancient 5-foot 7 penguin weighed at least 220 pounds and speared fish with its sizable beak.

The crest-tailed mulgara was once a common sight in New South Wales deserts before other predators edged it out of the habitat.

The U.S. Fish and Wildlife Service declared the eastern cougar extinct after it not being seen for over 80 years.

Can lost species ever become un-extinct? Many scientists believe it's only a matter of time before many extinct animals again walk the Earth through cloning.

BirdLife International has confirmed the extinction of eight bird species, including the Spix' macaw in Brazil.

Researchers discovered a Chelonoidis phantasticus giant tortoise on Fernandina Island. The last time this tortoise was seen was 1906.

Humans have driven almost 600 plant species extinct since 1750s and that number is likely much higher.

Soon, customers may be able to shop and sip at a Target store in Chicago.

A festive punch lets your guests know you're ready to celebrate.

An impact basin spotted on Mercury with two smaller craters above it looks remarkably like the sweet treat-loving Cookie Monster muppet of "Sesame Street" fame.

Whether it's a white lie or a whopper, fibs are part of our daily lives. We like to think we're honest but, well, we're not. Test your falsehood expertise.

The Earth's mountains, rivers, animals and rocks have been around for millions or billions of years. Do you know which ones have been around the longest?

Every two years, the National Science Foundation asks 10 questions to see how much Americans know about science.

UPDATE: Van Jones clears up the 'green czar' buzz.

Former Carter advisor and energy guru S. David Freeman will become the 'environmental mayor' of L.A.

Google lays out a plan to make renewable energy cheaper than coal.

When the Winter Olympics wrap up, Vancouver will be passing more than one torch. The city could light the way for green cities of the future by proving economic

Answer 20 questions to get your resiliency score -- and find out how self and community-sufficient you are.

Oilman's plan still aims for energy independence, but now focuses on conversion of tractor-trailers to natural gas instead of giant Texas wind farm.

A well-known Chinese solar power company has filed for bankruptcy, but this may actually be a sign of health for the industry.

Energy Secretary Steven Chu fields energy efficiency questions from the public.

The Bramble Cay melomys lost most of its habitat to rising sea levels.

Psychologists and scientists are concerned about the rising rates of suicide among children, and what the shrinking gender gap might mean.

255 top climate scientists are reiterating their conclusions on global warming in the face of increased e-mail attacks.

Science lingo may hurt efforts to inform the general public, a new study warns.

AT&T's ZERO Charger won’t draw electricity from a power outlet when disconnected from a mobile phone.

GE Ecomagination contest hopes to solicit the smartest solutions for a much-needed quantum leap in electrical grid technology.

Increasingly efficient computers belie the truth that our virtual world is using more and more electricity.

Daniel Ballou separates the working parts from the heavy parts to make a speaker system out of concrete blocks.

An Armillaria gallica mushroom found in Michigan's Upper Peninsula is growing fast, and the secret to its phenomenal growth might hold the cure to cancer.

The affordable organic cotton fashion line threw a star-studded private shopping party in Venice, Calif.

During a live webcast, Walmart reveals its new global sustainable agriculture goals.

Buck the summertime tropical/nautical pillow trend and indulge your inner science dork by opting for Gus*Modern's new organic cotton graphic pillow line featuri

Experts believe that between one-third and one-half of cancers are preventable. Here's what you can do.

This book with blessings from many cultures and religions will make practicing gratitude for food, family and friends a renewed experience.

Even dining out for lunch twice a week can really add up.

France bans the use of pesticides in public parks and the sale of chemical pest-control solutions to amateur gardeners.

A few years ago, when Janet Jackson “oopsed” her way into Super Bowl and Federal Communications Commission history, 140 million viewers of the biggest game

The Swirl Faucet also saves water, so long as you aren't completely beguiled by its beauty.

Modern-day dowsers are helping drought-stricken California wineries and farms find water for their crops.

'If you see me, weep,' reads one of these so-called 'hunger stones.'

Study reveals what you can do to increase the likelihood of a speedy reply.

A Microsoft experiment goes awry in short order as Tay runs straight into Godwin's Law.