Aestivation Aestivation Aestivation or æstivation (from , summer, but also spelled estivation in American English) is a state of animal dormancy, similar to hibernation, characterized by inactivity and a lowered metabolic rate, that is entered in response to high temperatures and arid conditions. It takes place during times of heat and dryness, the hot dry season, which are often the summer months. Invertebrate and vertebrate animals are known to enter this state to avoid damage from high temperatures and the risk of desiccation. Both terrestrial and aquatic animals undergo aestivation. The fossil record suggests that aestivation may have evolved several hundred
Hibernation (computing) and hibernation: The machine can resume instantaneously, and its state, including open and unsaved files, survives a power outage. Hybrid sleep consumes as much power as sleep mode while hibernation powers down the computer. Early implementations of hibernation used the BIOS, but modern operating systems usually handle hibernation. Hibernation is defined as sleeping mode S4 in the ACPI specification. On Windows computers, hibernation is available only if all hardware and device drivers are ACPI and plug-and-play–compliant. Hibernation can be invoked from the Start menu or the command line. Windows 95 supports hibernation through hardware manufacturer-supplied drivers and only if compatible