Search results
Results from the WOW.Com Content Network
Sleep can follow a physiological or behavioral definition. In the physiological sense, sleep is a state characterized by reversible unconsciousness, special brainwave patterns, sporadic eye movement, loss of muscle tone (possibly with some exceptions; see below regarding the sleep of birds and of aquatic mammals), and a compensatory increase following deprivation of the state, this last known ...
A lullaby (/ ˈ l ʌ l ə b aɪ /), or a cradle song, is a soothing song or piece of music that is usually played for (or sung to) children (for adults see music and sleep). The purposes of lullabies vary. In some societies, they are used to pass down cultural knowledge or tradition.
Aestivation has been put forward as the most likely explanation why this therapsid cynodont Thrinaxodon liorhinus shared its burrow with a temnospondyl amphibian, Broomistega putterilli. [ 11 ] Non-mammalian animals that aestivate include North American desert tortoises , crocodiles , and salamanders .
The world's smallest known vertebrate, Paedophryne amauensis, sitting on a U.S. dime.The dime is 17.9 mm in diameter, for scale. The word amphibian is derived from the Ancient Greek term ἀμφίβιος (amphíbios), which means 'both kinds of life', ἀμφί meaning 'of both kinds' and βίος meaning 'life'.
Some frogs that live high in trees even possess an elaborate degree of webbing between their toes. This allows the frogs to "parachute" or make a controlled glide from one position in the canopy to another. [57] Ground-dwelling frogs generally lack the adaptations of aquatic and arboreal frogs. Most have smaller toe pads, if any, and little ...
The world’s frogs, salamanders, newts and other amphibians remain in serious trouble. A new global assessment has found that 41% of amphibian species that scientists have studied are threatened ...
All living amphibians belong to the group Lissamphibia. They inhabit a wide variety of habitats, with most species living within terrestrial, fossorial, arboreal or freshwater aquatic ecosystems. Thus amphibians typically start out as larvae living in water, but some species have developed behavioural adaptations to bypass this.
In the United States, children's music continues to be a force in the commercial music industry. At one point in early 2006, the top three albums on the Billboard charts were all children's music: Disney 's High School Musical soundtrack, the Kidz Bop series, and the Curious George film soundtrack. [ 7 ]