Black holes, wormholes and time machines
a National Research Centre ‘Kurchatov Institute’, pl. akad. Kurchatova 1, Moscow, 123182, Russian Federation
b Astro Space Centre, Lebedev Physical Institute, Russian Academy of Sciences, ul. Profsoyuznaya 84/32, Moscow, 117997, Russian Federation
c Niels Bohr Institute, Blegdamsvej 17, Copenhagen, DK-2100, Denmark
d Niels Bohr International Academy, Niels Bohr Institute, Blegdamsvej 17, Copenhagen, DK-2100, Denmark
Three major predictions of Einstein's general relativity — black holes, wormholes, and time machines — are reviewed for their development and current status.