Articles concerning: physics

The recent 50th anniversary of Doctor Who makes it seem only fitting that we have a chat about time travel. The Doctor manages it with the help of his TARDIS, some amazing, high budget sound effects and a fancy bow-tie, but can it actually be done?
'Is time travel possible?'

In the beginning of the 70’s, a strange discovery created a sensation. A load of uranium that was intended for the French nuclear industry, was found to have a content in 235U , the fissionable isotope of uranium, smaller than expected. This discovery led to a series of assumptions ranging from fears for theft of fissionable material by some unknown country or organization to scenarios of UFO involvement, or confirmation of the existence of an advanced ancient civilization. However the truth was still more impressive.

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