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5 December 2013 11:26 am ,
Vol. 342 ,
An animal rights group known as the Nonhuman Rights Project filed lawsuits in three New York courts this week in an...
Researchers have been hot on the trail of the elusive Denisovans, a type of ancient human known only by their DNA and...
Thousands of scientists in the Russian Academy of Sciences (RAS) are about to lose their jobs as a result of the...
Dyslexia, a learning disability that hinders reading, hasn't been associated with deficits in vision, hearing, or...
Exotic, elusive, and dangerous, snakes have fascinated humankind for millennia. They can be hard to find, yet their...
Researchers have sequenced and analyzed the first two snake genomes, which represent two evolutionary extremes. The...
Snake venoms are remarkably complex mixtures that can stun or kill prey within minutes. But more and more researchers...
At age 30, Dutch biologist Freek Vonk has built up a respectable career as a snake scientist. But in his home country,...
- 5 December 2013 11:26 am , Vol. 342 , #6163
- About Us
Seeing the Sea Floor
30 July 1997 7:00 pm
Today is the 77th birthday of Marie Tharp, an oceanographic cartographer whose maps of the world's sea floors helped shape a new view of Earth--plate tectonics--in which crustal plates constantly shift and move on top of the mantle. During the 1940s Tharp and her co-worker Bruce Heezen used sonar to gather data on the topography of the floor of the Atlantic Ocean. From this they assembled in 1952 the first three-dimensional picture of the sea floor, which revealed a deep valley along the crest of the Mid-Atlantic Ridge. They suggested that this was a plausible location where molten rock wells up to form new oceanic crust. By 1959 their interpretation was validated by data showing high seismic activity in the suspected rift valley.
[Source: Emily McMurray, Ed., Notable Twentieth Century Scientists (Gale Research Inc., ITP, 1995).]