Зрозуміло / Понятно
Шановний користувач!
На жаль, ми вимушені закрити цей проект і з 30 листопада 2020 він перестане працювати. Просимо свої вибачення за можливі незручності.

Уважаемый пользователь!
К сожалению, мы вынуждены закрыть этот проект и с 30 ноября 2020 он перестанет работать. Приносим свои извинения за возможные неудобства.

NASA | Zebra Crossing

zabug
07.08.2013
zabug
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Botswana's Okavango Delta and the Makgadikgadi Salt Pans are two ends of a
360-mile round trip zebra migration, the second longest on Earth. In this
animation, shades of red show dry areas, green represents vegetation, and
the dots show GPS tracked zebras. The zebras begin at the Okavango Delta in
late September. After the dry Southern hemisphere winter, November rains
signal it is time to begin their two-week journey to the Salt Pans. The
zebras feast on nutrient-rich grasses all summer, and return to the Delta as
the rain peters out in April.

Fences blocked this zebra migration from 1968 to 2004. After they came down,
researchers began tracking zebras with GPS and discovered this migration.
They compared the zebras' location to NASA satellite data of rainfall and
vegetation, and they found that migrating zebras have quickly learned when
to leave the Delta and the Salt Pans using environmental cues. Researchers
then use these cues to predict when the zebras will be on the move, a
powerful tool for conservation.
This video is public domain and can be downloaded at: http://svs.gsfc.nasa.gov/goto?11333

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