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Botanists say the image on the new $20 bills is the leaf of a Norway maple, not the familiar sugar maple that graces Canada's flag. The Bank of Canada defends the image, saying it's a "stylized blend" of leaves from various maples.

We already know demographic trends can drive election results, but what's surprising is how quickly the map could change for good.

Tell Me More remembers Ebony Magazine's former managing editor, Hans Massaquoi. He arrived in America as an outsider, after growing up black in Nazi Germany. Host Michel Martin speaks with his former colleague, Lynn Norment about his career and legacy.

The writer, actress and comedian has helmed the hit NBC show — which will have its series finale on January 31 — for seven seasons, during which time she's had two kids, been in a few movies and written a memoir called Bossypants.

As the series prepares for its finale, the comedian talks about how Tina Fey created the character of Tracy Jordan specifically for Morgan and how she allowed him "to fly over the cuckoo nest once a week."

Reporting in Nature, researchers write of encoding a variety of files--jpg, mp3, txt and pdf--in strands of DNA. Lead author Nick Goldman says DNA is extraordinarily long-lasting, compared to today's hard drives and magnetic tapes. And if all the world's information were written in DNA, he says, it would fit in the back of a station wagon.

Thousands of demonstrators took to the street to protest the presidency of Hosni Mubarak. Some said the revolution's promise of change hasn't materialized.

Hurricane Sandy pummeled the beaches of the Northeast, stripping away sand and dunes, and ploughing through seawalls. Can beaches be rebuilt to face fiercer storms and rising seas? And is there even enough sand to do it? Ira Flatow and guests discuss engineering the nation's coasts for "the new normal."

If the country sees another quarter of negative growth, it will officially enter its third recession in four years. That's unchartered territory.

To stay in shape, many people stand while they work, or even use a treadmill desk. The latest advice might get you out of the building altogether. Ditch the boardroom and walk while you meet.