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5 December 2013 11:26 am ,
Vol. 342 ,
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,...
Since arriving on the island of Guam in the 1940s, the brown tree snake ( Boiga irregularis ) has extirpated native...
- 5 December 2013 11:26 am , Vol. 342 , #6163
- About Us
Early Planet Theory: Not Standing on Solid Ground
29 April 1998 6:00 pm
Forest Ray Moulton, an American astronomer known for a dominant early theory on how planets form, was born on this day in 1872. Moulton and Thomas Chrowder Chamberlin proposed in 1904 that the solar system formed after gas flares were ripped from the sun by the gravitational field of a passing star. The flares then condensed into "planetesimals" arrayed in a spiral extending from the sun; these planetesimals, the duo suggested, gradually accumulated material and became the planets we know today. Although it is now believed that gas ejected from the sun will not condense into solids, Moulton and Chamberlin's idea of a spiral galaxy influenced later astronomical observations, such as those of the rotating Andromeda galaxy.
[Source: Emily McMurray, Ed., Notable Twentieth Century Scientists (Gale Research Inc., ITP, 1995).]