Roger Penrose, who won the 2020 Nobel Prize for Physics, said on Tuesday that the biggest outstanding riddle about black holes was the question of what went on in the very centre of them - the ...

A renowned brainteaser referred to as Einstein's riddle is causing quite the stir online with people spending hours trying to determine the correct solution, and many giving up. Despite posing a ...

A famous brainteaser is leaving countless people online baffled - with some admitting taking hours to solve it. The puzzle, known as Einstein's riddle, has sparked heated discussion online as puzzle ...