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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, 21 May 2019

The Basic Physics of the Kilogram's Fancy New Definition

The kilogram is now based on energy changes in the quantum world rather than a physical object. Here's how that works.

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