It is the largest continuous area of primary broad leaf forest ecosystem in the whole sub-tropical zone.

UNESCO: EDUCATION

One of those surprises came during a visit to Eglin Air Force Base on the Florida panhandle, where he went to see the old-growth long-leaf pine forest.

CNN: Trekking 5,000 miles to connect man and wildlife

To complement these ground-based measurements, which can focus on only a limited area, the team will conduct aerial surveys once a year at each core site, looking at things like leaf chemistry and the health of forest canopies, and will also look down on them with satellites.

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Silver leaf monkeys and troupes of macaques are also common sightings in this forest.

BBC: Drifting down the Sekonyer

Or so it seemed until the 1950s, when collector Forest Sweet, who had accumulated six stray leaves (a leaf being a single two-sided page), deduced they came from Washington's original.

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