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'''Dormancy''' is a state of reduced [[metabolism|metabolic activity]] that many [[organism]]s adopt during periods of [[environment]]al stress.<ref>[http://www.britannica.com/EBchecked/topic/169514/dormancy "dormancy." Encyclopædia Britannica Online]</ref>  The stress may be expected (e.g., [[winter]] and [[summer]], two common times of dormancy) or unexpected (e.g., [[drought]]).  Dormancy during winter and summer is called hibernation and aestivation, respectively.

'''Dormancy''' is a state of reduced [[metabolism|metabolic activity]] that many [[organism]]s adopt during periods of [[environment]]al stress.<ref>[https://www.britannica.com/EBchecked/topic/169514/dormancy "dormancy." Encyclopædia Britannica Online]</ref>  The stress may be expected (e.g., [[winter]] and [[summer]], two common times of dormancy) or unexpected (e.g., [[drought]]).  Dormancy during winter and summer is called hibernation and aestivation, respectively.

==Hibernation==

==Hibernation==

As noted above, hibernation is a behavior of certain animals, particularly in cold climates, of entering dormancy as a means of coping with the vicissitudes of winter. While many animals will sleep more than usual during the winter, true hibernation involves dramatically reduced heartrates and body temperatures, generally over a single unbroken period of torpor.

As noted above, hibernation is a behavior of certain animals, particularly in cold climates, of entering dormancy as a means of coping with the vicissitudes of winter. While many animals will sleep more than usual during the winter, true hibernation involves dramatically reduced heartrates and body temperatures, generally over a single unbroken period of torpor.