chart trending up


USA temperature map thumbnail


Maps of USA State Temperatures For Each Season

A series of USA maps illustrates how state temperatures change across the seasons.

What's Your Weather Personality Type?

Scientists have identified four personality types based on how weather affects a person's mood.

lightning strike - NOAA

Natural Hazards

What Are the Odds You'll Get Struck By Lightning?

The chances of getting killed by lightning in Canada are generally less than one in a million. But some people's odds of encountering a deadly strike are much higher than average.

Winter Storms Have Grown More Devastating

Severe winter storms that leave behind million of dollars in damage have become less common in the United States. But, individual storms have become more massive and destructive.



How Many Undiscovered Species Are Left to Find

Most of the world's species remain undiscovered by science. Here are estimates of how many animals and plants have yet to be found.

Warming Causes Salamanders to Lose Their Stripes

Red-backed salamanders in eastern North America have responded to warming temperatures by losing their namesake red stripe.

Arctic ice

Climate Change

Thoreau Waited Longer for Spring to Arrive

Scientists have compared their own recent observations of when Massachusetts plants start flowering in spring with the records Henry David Thoreau made 150 years ago.

Arctic Ice Dynamics Destabilizing

Global warming has broken down the relationship between Arctic climate patterns and fluctuations in the volume of Arctic ice.

orangutan - Lionel Leo

Endangered Animals

Why Orangutans Are Endangered

Loggers, farmers, poachers and pet dealers have all played a role in the endangered orangutan's decline.

Recently Extinct Animals in North America

List of extinct animals and plants in Canada and the United States, including species and subspecies that have disappeared since 1960.

whitebark pine trees - Paul Bolsted, Bugwood


Why Tree Ranges are Different Sizes

Scientists have uncovered the overriding principles that govern why some tree species are confined to a narrow range of latitudes while others thrive across a continent.

Warm Climate Opens Boreal Forest to Pine Beetles

Temperatures in boreal forests extending across Canada will soon be warm enough for destructive mountain pine beetles.

Anacapa Island, California

Invasive Species

Islands Rescued From Invasive Rats

Huge gains have been made over the last twenty years in stopping invasive rats and mice from destroying island biodiversity.

Aquarium Fish Poised to Invade Lakes

People dumping their pet fish into local waterways could introduce yet another exotic species into the Great Lakes watershed.

Weather Extremes

Average Weather

Science Articles

Related Site