Trying to figure out where that confiscated rhino horn came from? Is that guitar made from a piece of endangered tropical hardwood? You might find the answers to your questions at the US Fish & Wildlife Service's Forensic Lab in Ashland, Oregon, the only one like it in the world.
In the Geo Quiz, we're searching for the Doyenne. La Doyenne means "the oldest". It's also the French nickname for one of Europe's most famous bike races. The race starts and ends in a Belgian city we want you to to name.
A brown, fuzzy alga called didymo is invading cold trout and salmon streams. Didymo, better know as rock snot, and perplexed scientists are trying to figure out how and why it's rapidly spreading in North America.
For today's Geo Quiz, we asked what direction you're traveling in if you're crossing the Panama by train from the Pacific to the Atlantic. The answer is northwest. Reporter Murray Carpenter recently took the train ride and sent us an audio postcard.
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