english: In the 1970s, Stephen Hawking told us that a black hole, even though you think it's black, it actually emits radiation when you take into account quantum mechanics.
non_english: V 70-tych rokoch nám Stephen Hawking povedal, že čierna diera, aj keď si myslíte, že je čierna, vlastne vyžaruje radiáciu, ak vezmete do úvahy kvantovú mechaniku.