Is time travel possible? Commonsense tells us it is not. Time machines, surely, are simply the stuff of science fiction. But scientists from California to Moscow are now seriously investigating the possibility. Their startling finding is that the laws of physics do allow for the existence of time machines — but there is no prospect of a human being using one to go back and change the past.
pretending to be based on Einstein's theory of relativity, with which he wanted to impress his readers.
To their surprise, when wheeler and his colleagues looked closely at the relevant equations they found imitations unnecessary. According to Einstein's theory, "tunnels" through both space and time really might exist.
1) Embora o homem realmente possa vir a construir uma máquina do tempo, o que não lhe será possível fazer?
2) Que embasamento científico fundamentaria a existência da máquina do tempo?