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Do you Still Need A TV Aerial?

At the moment you need TV Aerials for Freeview and BT Vision but there is the Freesat alternative that is by a satellite dish. But I beli...

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Tuesday, 19 December 2017

How to Run Up a Wall—With Physics!

This crazy parkour move, where a guy bounds up between two walls by jumping from one to the other, is based on the momentum principle and friction.

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