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When water is dropped on a hydrophobic surface, rather than spread out over the object, the water forms droplets. Some plants, animals, and insects have hydrophobic surfaces and will repel water ...
This has been observed in geckos and spiders but also in the smooth adhesive pads of ants, bush-crickets and cockroaches. [3] Adhesive hairs of geckos are non-symmetrical and feature distally pointing setae and spatulae that are able to generate increased friction and adhesion when aligned with a proximal pull. [3]
The interactions between the gecko's feet and the climbing surface are stronger than simple surface area effects. On its feet, the gecko has many microscopic hairs, or setae (singular seta), that increase the Van der Waals forces - the distance-dependent attraction between atoms or molecules - between its feet and the surface.
The two front feet of a tokay gecko can withstand 20.1 N of force parallel to the surface with 227 mm 2 of pad area, [4] a force as much as 40 times the gecko's weight. . Scientists have been investigating the secret of this extraordinary adhesion ever since the 19th century, and at least seven possible mechanisms for gecko adhesion have been discussed over the past 17
In 1885, George Boulenger placed D. marmoratus in the genus Phyllodactylus (the leaf-toed geckos). [4] It remained in that genus until 1984, when a revision by Wells and Wellington placed it in the genus Christinus. [5] A study conducted by King in 1977 showed that C. marmoratus exhibits considerable geographic variation in karyotype across its ...
Two wall sculptures of geckos on the wall of the Mandapam of the Siva temple inside Vellore Fort, Tamil Nadu, India (2012) In the Philippines, geckos making a ticking sound are believed to indicate an imminent arrival of a visitor or a letter. [37] But in Thailand, if a common house gecko chirps when someone leaves the house, that's a bad omen.
Like other reptiles, geckos are ectothermic, [15] producing very little metabolic heat. Essentially, a gecko's body temperature is dependent on its environment. Also, to accomplish their main functions; such as locomotion, feeding, reproduction, etc., geckos must have a relatively elevated temperature.
Leopard geckos were first described as a species by zoologist Edward Blyth in 1854 as Eublepharis macularius. [1] The generic name Eublepharis is a combination of the Greek words eu (good) and blepharos (eyelid), as having eyelids is the primary characteristic that distinguishes members of this subfamily from other geckos, along with a lack of lamellae.