"Un genio es alguien que descubre que la piedra que cae y la luna que no cae representan un solo y mismo fenómeno."

"The hardest thing is when you try to please someone who is not convinced."

"Trivial words but with great meaning."

"It has been a long-standing challege for to construct a theory of quantum gravity. String theory is the leading candi…"

"In most situations, the contradictory requirements of quantum mechanics and general relativity are not a problem, bec…"

"These of are very powerful. Let us recall the situation in flat space. If we have a massive in flat space then we can…"

"Interestingly, both quantum entanglement and s date back to two articles written by Albert Einstein and his collabora…"

"... spacetime as a concept leads to some … where the equations fail. This happens in the interiors of the black holes…"