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The first time Brazilian biologist Fernanda Abra saw a Groves’ titi monkey, one of the most 25 endangered primates in the world, it was positioned right next to a road. “It was totally exposed ...
The hands and feet of primates evolved to be capable of grasping, which facilitated movement along branches, reaching out for food, and ensuring stability in the canopy. One of the most distinctive features of primate limb evolution is the development of opposable thumbs, and in some species, opposable big toes. This opposability allows ...
Construction site safety is an aspect of construction-related activities concerned with protecting construction site workers and others from death, injury, disease or other health-related risks. Construction is an often hazardous, predominantly land-based activity where site workers may be exposed to various risks, some of which remain ...
Wet adhesion is common in tree frogs and arboreal salamanders, and functions either by suction or by capillary adhesion. Dry adhesion is best typified by the specialized toes of geckos, which use van der Waals forces to adhere to many substrates, even glass. Frictional gripping is used by primates, relying upon hairless fingertips.
A tree house in the park of the Château de Langeais in the Loire Valley, France. A tree house, tree fort or treeshed, is a platform or building constructed around, next to or among the trunk or branches of one or more mature trees while above ground level. Tree houses can be used for recreation, work space, habitation, a hangout space and ...
Galagos are tree dwelling primates and are capable of leaping significant distances, up to and sometimes greater than 2.5 metres (8 ft 2 in), [10] using flattened disks on their feet and hands as a way of grasping branches. [11] However they do walk on the ground sometimes, either bipedally or on all fours. [11]
Underground construction has a number of unique risks and challenges but shares a lot with traditional construction and mining. Underground construction workers often work under reduced light condition, in dangerous spaces, and are at a high risk of exposure to contaminants, fire, and explosions.
A favoured site for a drey is a tree crotch about 9–13 m (29–42 ft) above ground level. Squirrels may also nest in attics or exterior walls of buildings, where a drey may be regarded as a fire hazard, as some squirrels have a habit of gnawing on electrical cables. At other times, squirrels may inhabit a permanent tree den in the hollow of a ...