英语科普大全

Halos, Bubbles and Old Explosions日冕、气泡和远古爆炸A newly discovered hot halo, a cosmic fountain and ghostly bubbles produced by an ancient explosion could c...

Black holes on a collision course　趋于碰撞的黑洞Scientists say Chandra provides first evidence that two such mysteries can coexist in one galaxy.科学家说，钱德拉望远镜首...

When People Fled HyenasOversized Hyenas May Have Delayed Human Arrival in North America当人们逃离鬣狗的时候超大型的鬣狗可能推迟了人们到达美国北部　Nov. 20 - Deep inside a cave in S...

New Year's Day 2006: delayed by a second 　Scientists are delaying the start of 2006 by a leap second.Get ready for a minute with 61 seconds. Scien...

Extra Second Will be Added to 2005 An extra second will be added to 2005 to make up for the slowing down of the Earth's rotation, officials said t...

The deserts of north Africa are threatening to leap the Mediterranean and creep through Spain, according to government figures made public as part of ...

Jan.31,2007Imagine what it might be like if you were in your bedroom during an earthquake. Your bed shakes. Books and stuffed animals tumble from shel...

Jan.31,2007The smell of rotten eggs probably makes you cringe. But, for penguins, this smell might mean there's a meal nearby.New research shows t...

Jan.31,2007When the Wright Brothers lifted off at Kitty Hawk in 1903, they flew a plane with two sets of wings, one below the other. Their feat went d...

Global warming may be twice as bad as feared The impact of global warming could be twice as severe as the worst scenario feared by United Nations scie...