There's no explanation for why Bertha went from barely a hurricane to a Category Three storm in just a few hours, highlighting a need for more research into rapid intensification, meteorologists say.

A grassland like those found throughout Western Europe shows very little change in species composition even after 13 years of controlled exposure to higher temperatures and shifting rainfall patterns, a new study says.

The "world's most active volcano" put on a spectacular fireworks show for the 4th of July, spewing a plume 150 feet (46 meters) high and sending lava into the sea.

Mercury is covered by volcanoes, a mysterious ion cloud, and scars from a violent past, reveal the first in-depth studies of the solar system's smallest planet in decades.

A beach full of red balloons, a new Argo setting sail, and a U.S. flag lit up by lightning are among this week's most colorful events.

Most car buyers in the U.S. don't know that even small boosts to gas-guzzler efficiency can save more fuel than bigger mpg gains in already efficient vehicles, according to a new study.

A well-preserved town provides rare clues to the daily lives of ancient Egyptians, including the importance of local commerce and politics, archaeologists say.

A dense and highly interconnected structure inside the human brain seems to play a vital role in communication within and between the hemispheres, a new study says.

On the anniversary of the massive blast, U.S. experts are calling for increased funding to protect Earth from destructive meteor strikes.

A bloom of microbes detected near a crumbling underwater crater suggests that early Mars may have also hosted life in subsurface areas struck by asteroids.

Rapid changes in the churning movement of Earth's liquid outer core are weakening the magnetic field in some regions of the world, according to a new study.

Scientists say there is no chance that Europe's Large Hadron Collider will produce an apocalyptic black hole or deadly catastrophe when testing begins in August.

Copious chemicals and plastic make conventional banana growing far from "green." But a remote university is producing eco-friendly bananas that may be in your local grocery.

"You might be able to grow asparagus in it," said one scientist, based on preliminary findings of soil composition and pH from the Phoenix Mars Lander.

Flames licked at leaping Spaniards, twin galaxies came to light, riot police slept in the streets, a typhoon whipped up a stunning tableau, and more.