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Jul 20, 2012 11:05 AM ET // Tim Wall
The Magellanic penguin normally migrates from Argentina to southern Brazil around this time of year, but there are normally fewer than 500 dead birds found on the beaches each year.
Mar 23, 2011 08:09 AM ET // John D. Cox
The world's largest eddies are spinning off the coast of Brazil.
Jul 20, 2011 11:21 AM ET // Tim Wall
Soybeans and sugarcane crops have increased deforestation of the Amazon in Brazil, but not directly.
Sep 15, 2011 03:03 PM ET // Tim Wall
Diamond inclusions indicate that Earth's carbon cycle extends from the surface to the deep lower mantle.
Nov 2, 2010 08:00 AM ET // Tim Wall
Without rain, a rainforest doesn't last too long.
May 6, 2011 10:06 AM ET // Tim Wall
On the lookout for ways to help manage deforestation, NSF-funded Michigan geographers map out an adventure.
Apr 19, 2011 11:29 AM ET // Tim Wall
Sugarcane, already considered an ideal biofuel crop because its growth in tropical areas mean little freshwater is wasted on irrigation, is now shown to have climate cooling powers as well.
Jan 10, 2012 11:31 AM ET // Tim Wall
The Brazilian savanna is home to a subterranean little shop of horrors for tiny worms.