Dr. Who used the this time machine, called the TARDIS, to travel through space and time on the BBC television show Dr. Who.
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Who wouldn't want to travel in time, glimpsing the dinosaurs or peeking at humans 2,000 years from now? Now physicists have designed a time machine that seems deceptively simple.
We don’t know what the black hole at the centre of the Milky Way will look like.
The first ever picture of the Milky Way's black hole is expected to be a bright crescent shape rather than a disk.
“Infinite” is where we get to when we reach the limits of our understanding.
Peruse the astrophysical literature and you could be forgiven for thinking black holes exist. But do they really? What makes a black hole special is its event horizon: a no-return gateway to an unknowable…