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From Science News



NEW THEORY ON DINOSAURS: MULTIPLE METEORITES DID THEM IN
from The New York Times

For more than a decade, most scientists have believed that the
extinction
of the dinosaurs was caused by a single event: the crash of an immense
body
from outer space, its explosive force like a hundred million hydrogen
bombs, igniting firestorms and shrouding the earth in a dense cloud of
dust
that blocked sunlight and sent worldwide temperatures plummeting.

The theory gained wide acceptance in 1991, after the discovery of a
crater
buried under the tip of the Yucatán Peninsula. The giant gash
stretched 110
miles from rim to rim, and its age was found to be 65 million years,
the
same time as the death of the dinosaurs.

Now, however, scientists working in Ukraine have discovered that a
well-
known but smaller crater, some 15 miles wide, had been inaccurately
dated
and is actually 65 million years old, making the blast that created it
a
likely contributor to the end of the dinosaurs.
<http://www.nytimes.com/2002/11/05/science/life/05CRAT.html>