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How do strokes work?

In a stroke, something disrupts the normal blood supply to parts of the brain. Without oxygen, affected brain cells will begin to die. Tune in as Mars... Read more

January 16, 2015 | 4 min

Can people really build missiles from scratch?

In the film Salt, Angelina Jolie's character creates a missile from handy household ingredients -- but could this happen in real life? Tune in as Mars... Read more

January 14, 2015 | 5 min

Semi Submarines

There's a reason that most submarines are owned by governments - they're incredibly expensive. So what's a sub-loving consumer to do? Tune in as Marsh... Read more

January 12, 2015 | 5 min

How can an electric toothbrush recharge its batteries?

An electric toothbrush gets power from its base without the help of metal contacts. Find out how this sealed system works in the following podcast fro... Read more

January 9, 2015 | 1 min

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