Analysts say the migrants encountering ever-increasing enforcement in the Arizona desert are bouncing back to California's smuggling corridors, which offer shorter, cooler treks to cities and highways.
Will the Large Hadron Collider save the world, or destroy it? Researchers and the general public struggle to figure out the practical impact of particle physics.
Scientists are studying a huge cache of Ice Age fossil deposits recovered near the famous La Brea Tar Pits in the middle of the second-largest U.S. city.
The Obama administration on Tuesday agreed to review whether it should regulate carbon dioxide emissions from coal-fired power plants, portending a major reversal of the Bush administration's policy on global warming.
The U.S. government will release $4 billion in additional aid to General Motors Corp. and $3 billion to Chrysler LLC
President Barack Obama launches an economic whirlwind this week, signing the newly passed $787 billion economic stimulus package in Colorado, before moving to Arizona to tackle the home mortgage foreclosure crisis.
The president\\\\\\\'s massive $790 billion economic stimulus plan is on track for a Friday vote in the House, Democratic leaders say, after a 24-hour delay caused by late, lingering controversy.
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Cache of Ice Age fossils found in Los Angeles
GM, Chrysler to get $7 billion in bailout cash
EPA to review Bush rule on emissions
Obama to tackle economy in whirlwind week
Obama to tackle economy in whirlwind week
Obama to tackle economy in whirlwind week
Congress readies final vote on stimulus bill
Congress readies final vote on stimulus bill
Congress readies final vote on stimulus bill
Congress readies final vote on stimulus bill