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  2. Zero Gravity Research Facility - Wikipedia

    en.wikipedia.org/wiki/Zero_Gravity_Research_Facility

    The Zero Gravity Research Facility was built in 1966 as part of NASA's Centaur upper-stage rocket development program. In order to ensure proper firing and functioning of upper-stage rockets, NASA needed to understand the behavior of fluids (importantly, the liquid gases fueling the rockets), in the reduced gravity where they would fire.

  3. Grey-headed robin - Wikipedia

    en.wikipedia.org/wiki/Grey-headed_Robin

    The nest is a shallow cup made of bark, grass, and dry leaves. Spider webs are used for binding or filling, and strips of fern and palm for lining; the outside is decorated by dried vegetation. The nest is generally placed in a lawyer vine up to 10 m (30 ft) above the ground. A clutch of one or two eggs is laid.

  4. Australasian robin - Wikipedia

    en.wikipedia.org/wiki/Australasian_robin

    Nests are cup-shaped, usually constructed by the female, and often placed in a vertical fork of a tree or shrub. Many species are expert at adding moss, bark or lichen to the outside of the nest as camouflage , making it very difficult to spot, even when it is in a seemingly prominent location.

  5. Western yellow robin - Wikipedia

    en.wikipedia.org/wiki/Western_Yellow_Robin

    The western yellow robin (Eopsaltria griseogularis) is a species of bird in the Australasian robin family, Petroicidae, native to Australia. Described by John Gould in 1838, the western yellow robin and its Australian relatives are not closely related to either the European or American robins, but they appear to be an early offshoot of the Passerida group of songbirds.

  6. North Island robin - Wikipedia

    en.wikipedia.org/wiki/North_Island_robin

    The North Island robin (Petroica longipes; Māori: toutouwai, pronounced [ˈtoutouwai]) [2] is a species of Australasian robin endemic to the North Island of New Zealand.It and the South Island robin (P. australis) of the South Island and Stewart Island were once considered conspecific (and called the "New Zealand robin"), but mitochondrial DNA sequences have shown that the two lineages split ...

  7. South Island robin - Wikipedia

    en.wikipedia.org/wiki/South_Island_robin

    The South Island robin is a small passerine, 10–18 cm in length and weighing around 35 g. North Island robins do resemble both females and juveniles of the South Island robins, as well as all the Stewart Island robins, which can sometimes make it difficult to distinguish between the three.

  8. Greater ground robin - Wikipedia

    en.wikipedia.org/wiki/Greater_ground_robin

    There are two recognised subspecies of the greater ground robin: [2] A. s. sclateriana - The nominate subspecies, found in the mountains of the Huon Peninsula. A. s. occidentalis - Found in the Oranje Mountains in central New Guinea. It has browner and more mottled underparts than the nominate subspecies does. [2] [3]

  9. Weightlessness - Wikipedia

    en.wikipedia.org/wiki/Weightlessness

    Weightlessness is the complete or near-complete absence of the sensation of weight, i.e., zero apparent weight. It is also termed zero g-force, or zero-g (named after the g-force) [1] or, incorrectly, zero gravity. Microgravity environment is more or less synonymous in its effects, with the recognition that g-forces are never exactly zero.

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