English American black bear Cited by user Kpat628 on 15 May 2020 The International Union for Conservation of Nature (IUCN) lists the American black bear as a least-concern species, due to its widespread distribution and a large…
English Circadian clock Cited by user MaxEnt on 16 Mar 2017 A circadian clock, or circadian oscillator, is a biochemical oscillator that oscillates with a stable phase relationship to solar time.