The largest cut emerald in the world—57,500 carats—goes on the auction block this weekend. Teodora, or "God's Gift," was mined in Brazil, weighs 25 pounds and would make a startling pendant ...

The river was later named Rio Roosevelt. Flaviano Van-ique’s sphere of action is a section neglected by Roosevelt and Rondon, east of T.R.’s treacherous River of Doubt.

When Roosevelt reached Brazil, the country’s Foreign Minister abruptly offered him a rare opportunity: a chance to explore an unmapped river in the heart of the rain forest.

The River of Doubt: Theodore Roosevelt 's Darkest Journey by Candice Millard is a non-fiction book detailing the 26th President's travels in Brazil. This fascinating account is a must read for ...

Earlier this year, William Craddock traveled to the Pantanal region of Brazil and the River of Doubt, following in the footsteps of Theodore Roosevelt's legendary 1914 trek. His recent book, Noble ...

Roosevelt’s trip down the River of Doubt in Brazil’s Amazon almost brought him to death. After Theodore Roosevelt lost the 1912 election, he was devastated and bereft. He accepted an ...

I’m in Cacoal, Brazil, with National Geographic explorers Zeb Hogan (left), the world's foremost megafish expert, and Trip Jennings (right), an accomplished kayaker and filmmaker. Located 130 ...

‘River Without a Cause’ and ‘Into the Amazon’ Review: Cândido Rondon, Brazil’s Greatest Explorer Theodore Roosevelt’s Amazonian journey made news, but the expedition’s co-leader ...

In a river of northern Brazil, an “armored” creature swam through the water in search of its next meal — or tried to at least. But something caught the striped animal and pulled it to the ...

An estimated 10 to 20 tons of fish died on the Piracicaba River, prosecutors said. An initial investigation points to an "irregular discharge of wastewater" from a sugar and ethanol plant.