A rugged valley behind a silhouetted mountain viewed from World's End. Pollup

A rugged valley behind a silhouetted mountain viewed from World's End. PollupA rugged valley behind a silhouetted mountain viewed from World's End. Horton Plains National Park, Sri Lanka.

Storm clouds gather along the coast as a winter storm rolls in

A female Sumatran Tiger front paw size comparison to a human hand

An infant Hanuman langur monkey suckles from its mother

temperature increases in the world over the past 50 years

Looking up at an East Village apartment building with fire escapes

Windblown sand ripples and grass stems across a coastal dune surface

attracts insects for pollination

The dust and smoke laden dawn was so red and saturated I was lucky this occurred after the sun had risen a little above the horizon

A picturesque hiking trail winding through an alpine National Park

An SU27 Russian Jet Fighter trailing smoke as it races across the sky

Meerkat leaning on tail on mound

An aerial view of a lone man fishing in the ocean from the beach