Missing winter? For U.S., it’s coming

For most of the U.S., winter 2011/2012 has been fairly quiet and mild so far. But the models are all hinting at a significant change to come.

2011 was a year of tornadoes

Here's a look at the amazing and record-breaking year for tornadoes - 2011 - in the United States and the world. Many videos in this post.

Wild chimps sound alarms for unaware friends

Chimps are more likely to make alarm calls when snake is near when other chimps are unaware of the danger, the new evidence shows.

Powerful 6.8 magnitude earthquake shakes Japan

Buildings swayed in Tokyo on this New Year's Day 2012 as a 6.8-magnitude earthquake struck in the ocean near Japan.

Kieran Mulvaney on why polar bears are cool

Journalist Kieran Mulvaney became fascinated with polar bears a decade ago when he was in Alaska on assignment. His new book is called "The Great White Bear."

Top five natural disasters of 2011

2011 had remarkably many natural disasters. Here are EarthSky weather blogger Matt Daniel's descriptions of his picks for the top five.

Cyclone Thane hits India

Cyclone Thane hit southeastern India on December 30, 2011, killing at least 19 people and creating vast amounts of damage. Read more here.

Smallest frogs to date found in New Guinea

A zoologist has found the smallest frogs known to exist in the world, just a third of an inch in length, in the rainforests of southeastern New Guinea.

Wolves back in Yellowstone benefit the ecosystem, scientists say

Gray wolves returned to Yellowstone 15 years ago. Amid controversy, scientists say these top predators are keeping elk at bay and helping ecosystems flourish.

White Christmas in 2011?

White Christmas in 2011? Those in the southwestern United States and higher elevations such as mountain ranges probably have the best chances in 2011.