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Tim Samaras was an engineer who made probes that captured information at the base of the violent storms. He was inspired to chase tornadoes by the iconic scene in The Wizard of Oz.

EarthTalk®E - The Environmental MagazineDear EarthTalk: How far along are we at developing algae-based and other higher yield sources of biofuels? --…

"With a little more work, the start of final status negotiations could be within reach," the secretary of state said Sunday after four days of shuttle diplomacy. He met with Israeli and Palestinian officials.

U.S. inventor Douglas Engelbart was one of the visionaries of the computer age. Besides inventing the computer mouse, his insight laid the groundwork for the interactive technology we now take for granted. Engelbart was 88.

Commentator Alva Noë enters the Encyclopedic Palace at this year's Venice Biennale and finds it short on art, ideas and engagement. What was the curator thinking? But it's not all bad news. The Biennale is sprawling and there is much to enjoy, if you know where to look

President Obama campaigned in Iowa, Colorado, Nevada and California on Wednesday.

The superPAC supporting President Obama attracted three $1 million donors last month. The pro-Romney superPAC also saw some new names popping up on its donor list — and it got a million-dollar donation in three chunks from a return address in Dayton, Ohio.

The Pew Research Center says Asian-Americans are now the fastest-growing ethnic and immigrant group in the United States. Pew says Asian-Americans also tend to be the most educated and prosperous. But every Asian group here has a different immigration story.

Serge Haroche of France and David Wineland of the United States have been honored for their work on the interaction between life and matter — in particular, the "fundamental interactions between light particles and matter."

It's hard to determine just how many veterans became ill because they were at nuclear test sites, but one soldier who witnessed more than 20 bomb explosions in the Nevada desert in 1957 says a lot of good men died because of it.