Low-budget cinema maestro Roger Corman, who cranked out hundreds of outrageous films over six decades and helped launch the careers of acclaimed directors Martin Scorsese, Francis Ford Coppola, James Cameron and Ron Howard, died on Thursday at age 98, family members said.

Deep beneath Yellowstone National Park, one of the world's most dynamic volcanic systems, lies an enormous, previously unknown reservoir of hot, partly molten rock big enough to fill up the Grand Canyon 11 times, scientists say.

Researchers have unearthed the fossil of a remarkable creature resembling a big groundhog that lived during the age of dinosaurs, when most mammals were smaller than a mouse.