Citizen science: Help classify plankton in waters off southern California

Can you tell a Cydippid from a Solmaris? You can, with a little training. Scientists could use your help classifying plankton at the Plankton Portal.

Video: What will a warming world look like?

NASA has produced a new video that shows what changes in temperature and precipitation can be expected if atmospheric CO2 concentrations continue to rise.

U.S. sees another bright fireball on September 27

September 2013 has been busy for sightings of bright fireballs. The one at 11:33 p.m. local time on September 27 was the 14th fireball sighting in the U.S. in September.

6.8-magnitude earthquake rocks Pakistan on September 28

In a region of Pakistan said to be "desperate" following Tuesday's large earthquake, another earthquake struck earlier today.

Facebook language study predicts age, gender, personality traits

Researchers analyzed Facebook users' linguistic patterns to predict the individuals’ age, gender and responses to personality questionnaires.

Over 400 reports of large fireball over U.S. Midwest on September 26

People in Ohio, Illinois, Indiana, Kentucky, Missouri and Wisconsin saw it.

7.0-magnitude earthquake off coast of central Peru on September 25

USGS reported strong earthquake off coast of central Peru on September 25. Pacific Tsunami Warning Center warned of possible local events, but no Pacific-wide warning.

A shot of anxiety and the world stinks

How stress can rewire the brain - linking centers of emotion and olfactory processing - to change good smells to bad.

Powerful earthquake strikes Pakistan, raises new island

Hundreds are dead following a large quake that struck in a mountainous region of Pakistan. A new island has risen off Pakistan's coast.

Which cities are most at risk for a natural disaster?

Tokyo-Yokohama, the Pearl River Delta and Osaka-Kobe are the riskiest metropolitan areas in the world. Otherwise ... does your city make the list?