There are many possible reasons for the monarch's decline, scientists say. But they’re focusing now on one major one: Monarch butterflies can't survive without the milkweed.
It took a branch, a wall, and a smart chimpanzee ringleader to cause a "Code Red" at the zoo.
There has always been risk with spaceflight. But as missions get longer, just how much risk can it ask of its astronauts? NASA asked the Institute of Medicine for some advice.
A growing number of cities are paying homeowners to tear out their grass lawns and replace them with low-water plants more suited to the state's dry summers and mild winters.
James Gates is a passionate teacher and well-known physicist. He has colorful opinions about science teaching and the need for diversity of thought.
Called the Great Dying, a mass extinction occurred at the end of the Permian Period of the Paleozoic Era. The study named a new suspect, a microbe known as Methanosarcina.
In South Florida, many male panthers that are sent back into their natural habitat wind up dead, mostly from disease, fighting other males over territory, and cars.
“We knew these were just about the last mammoths living there, so we suspected something was happening,” said a paleontologist about what the rib bones suggest.
Researchers are looking into how dogs pick up on social cues from humans around them. It may tell us something about childhood development.
The 3-D maps app would use about the same processing power as the game Angry Birds.
At the time, it was the nation's biggest oil spill. And whether Prince William Sound in Alaska has by now recovered remains a contentious issue.
The report was written in 1999 and filed with the U.S. Army Corps of Engineers. The hill's history is one of landslides. The unstable hillside has defied efforts to shore it up.
Using a chicken, a scientist ruffles a few academic feathers.
A larger picture of the Milky Way is giving scientists more to study. With never-before-seen images, they are learning more about the galaxy, how it was formed and how fast it is growing.
Dennis Jenkins spent 30 years launching shuttles into space. Now, he's rebuilding the Endeavour shuttle to look just as it did before takeoff.
Scientists studied the possible effects of a huge earthquake coming from the Cascadia fault system 700 miles off the coast of northern California. They predicted massive damage.
The dig is near the famed La Brea Tar Pits, where many prehistoric remains were discovered over the years.
She spearheaded a study of the liver cancer that struck her at age 12. Getting an operation is the only effective treatment. But the cancer must be caught early.
A female Mormon butterfly can be deceptive. Its color pattern can mimic that of a poisonous butterfy, making predators leave it alone. But the males don't have this mimicry.
By studying the rings of ancient trees in Mongolia, scientists found a period of warm and wet weather. And it's no coincidence that's the time of Khan's rise to power.
A study suggests that social networking sites such as Facebook exert an emotional spillover effect on users. But some experts dispute this, and the debate over social contagion continues.
People who live there have a saying: "The lake is the boss." Seems the boss has given an extended vacation to tourists this winter, thanks to freakishly cold weather.
Nano-sized silver is being put in a lot of products, like clothes, to fight germs. But critics say not enough is known about the effects this will have on human health and the ecosystem.
While music hits many in the heart, some aren't moved at all, a new study says. They get no pleasure from it.
Scientists seeking a quicker and cheaper way to keep count of whales are looking to satellites.
The crystal was estimated to be about 4.4 billion years old. It is much smaller than a grain of rice.
An ancient technique comes in handy for today's high-tech labs.
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