Advent calendar door #17: Is time travel allowed?
Is it possible to travel backwards in time and into the past? Perhaps! The answer is likely controlled by a set of physical laws that we do not yet understand at all well: the laws of quantum gravity.
A few years ago Nobel laureate Kip Thorne wrote us an article exploring the topic, in which the strangeness of quantum physics comes to the fore, from black holes to wormholes. You can read the article here.