When couples go into hibernation mode together, it helps them to form a more intimate connection without external distractions. (eharmony.co.uk)
To avoid any kind of catastrophe, the reptiles went into hibernation for millions of years before being awakened by secret nuclear experiments in a Welsh mine. (rochester.edu)
The lander's tilted position meant that the comet's surface partially blocked Philae's antenna, making communication difficult, and the shady spot meant that the craft could not charge its solar panels, so Philae went into hibernation after just three days on the comet's surface. (scientificamerican.com)