Mar 20 1996
From The Space Library
At the Lunar and Planetary Science Conference, Adriana C. Ocampo, a geologist at NASA's Jet Propulsion Laboratory, announced the discovery of a chain of impact craters in Chad. According to a team of scientists, the presence of the craters suggested that a sizable comet or asteroid might have struck ancient Earth. Scientists discovered the craters using the Spaceborne Imaging Radar-C (SIR-C), which flew on Shuttle Endeavour's Mission STS-59 in 1994. The impact craters were only the second chain of large craters ever discovered on Earth and the first impact craters found using the SIR-C technology. Ocampo warned that scientists still needed to excavate the ground extensively before they could be sure that the craters were indeed impact structures.
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