A new study shows how cities alter the weather for thousands of kilometers downwind.
President Hugo Chavez appears to be well enough to resume treatment for his extremely aggressive cancer, minister says.
Tens of thousands of Chavez supporters rally in Venezuela amid uncertainty over his health.
Debated US gun control plan won't do nothing for the assault weapons that are currently owned.
Crowd funding has the potential to shift the way entrepreneurs research, develop and market products.
The cautious Barack Obama is gone as the president delivers his second inauguration speech.
NASA's Mars mission has revealed that a Martian crater may have once held a groundwater-fed lake.
Business booms and people feel freer, but socialist benefits and bureaucracy are still in place.
Hope flourishes in Sikh Temple in Oak Creek, Wisconsin five months after "white supremacist" shooting.
As news remains sparse on the fate of Hugo Chavez, Venezuelan politicians realise they can do nothing but wait.
Army judge grants sentence credit after brig staff refused recommendation from mental health professionals.