Marcus Aurelius Antoninus (a.d. 121 180) succeeded his adoptive father as emperor of Rome in a.d. 161 and Meditations remains one of the greatest works of spiritual and ethical reflection ever writ...więcej »
'If you feel you are in a black hole, don't give up. There's a way out'What is inside a black hole?Is time travel possible?Throughout his extraordinary career, Stephen Hawki...więcej »