Free Republic

Did Comets Cause Ancient American Extinctions?Anne Casselman for National Geographic NewsMay 6, 2008 Debate has heated up over a controversial theory that suggests huge comet impacts wiped out North America's large mammals nearly 13,000 years ago. The hypothesis, first presented in May 2007, proposes that an onslaught of extraterrestrial bodies caused the mass extinction known as the Younger Dryas event and triggered a period of climatic cooling. The theory has been debated widely since it was introduced, but it drew new scrutiny in March at the annual meeting of the Society for American Archaeology annual meeting in Vancouver, Canada. Stuart...

ISPs in the U.S. experienced a service slowdown Monday after fiber-optic cables near Cleveland were apparently sabotaged by gunfire. TeliaSonera, which lost the northern leg of its U.S. network to the cut, said that the outage began around 7 p.m. Pacific Time on Sunday night. When technicians pulled up the affected cable, it appeared to have been shot. "Somebody had been shooting with a gun or a shotgun into the cable," said Anders Olausson, a TeliaSonera spokesman. The damage affected a large span of cable, more than two-thirds of a mile [1.1 km] long, near Cleveland, TeliaSonera said. The company...

Thousands of Internet users struggled to send e-mail and keep their Web sites running Thursday after a dispute between two service providers left large portions of the Internet unable to talk to each other. Computer technicians scrambled to shore up their networks after Level 3 Communications Inc. refused to accept traffic from rival Cogent Communications Group Inc., rendering large portions of the Internet unreachable by others.