Photo of the Day 22 October 2007

Giant Quiver Trees, South Africa, 1995
Photograph by Chris Johns
Giant quiver trees rise from a rocky hill on the boundary of South Africa's Richtersveld National Park. These towering aloe plants, which can reach 33 feet (10 meters) in height, have suffered from heavy overharvesting and habitat loss and are considered critically endangered, with only a handful of specimens remaining.