Chris Field reports extreme weather on rise from climate change

Weather extremes - droughts, floods, and heat waves - on the rise worldwide over the past 50 years, are linked to climate change, according to Chris Field.

Fertilizers linked to increasing nitrous oxide in atmosphere

The rise in atmospheric nitrous oxide - a greenhouse gas - is largely the result of the use of nitrogen-based fertilizers, according to Berkeley chemists.

Animals’ teeth reveal what they eat

Animals' teeth reveal that if the animals eat hard foods they have rougher surfaces than those that eat soft foods.

White nose syndrome killing hibernating bats

The U.S. Fish and Wildlife Service yesterday announced $1.4 million in grants to help save bats - which play a key role in agriculture - from white nose syndrome.

White nose syndrome in bats spreads as far south as Alabama

White nose syndrome, a deadly fungal disease affecting bats in North America, has spread to Alabama, Missouri and Delaware, according to wildlife officials.

Tornadoes in Texas: Recap and videos of April 3, 2012

At least 11 confirmed tornadoes struck the Dallas-Fort Worth area on April 3, causing damage but no deaths. Here's what's known now, plus the best videos.

Destructive tornadoes rip through Dallas-Fort Worth

Amazing video from at least two separate large and destructive tornadoes in the Dallas-Fort Worth area earlier today.

Earthquake in Oaxaca felt in Mexico City

In Mexico City, people reportedly streamed out of office buildings as the earthquake was occurring. There are no initial reports of injuries or damages.

Solar eclipses have an effect on wind

Dr. Suzanne Gray said solar eclipses don't just turn the lights out - they also make the wind slow down and change direction.

Narwhals display sophisticated sword fighting techniques

No one has ever observed behavior of narwhals at depths so deep that sunlight never penetrates. Until now.

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