Spiky cactus branches glowing against sunset, tilt up to show a Saguaro cactus against warm orange sky.

Medium close up of two green female iguanas resting on a branch in an enclosure. One iguana turns its head to look at camera.

Sharp spines poking out from a cactus' green skin, camera re-focusses to show more spines in the foreground.

Antarctica Zooming in shot of icicles hanging inside crevasse penetrated by icy blue light.

Close up shot of a green iguana's head. It turns an eye to look at camera.

Antarctica: Hanging icicles inside crevasse penetrated by icy blue light.

Sydney, Australia: Pan up from waters of Sydney Harbour to show the Sydney Opera House with its shell-like roof set against cloudy sky.

Grooved stem of a cactus with small spines poking out from its skin.

Sharp spines poking out from a cactus' green skin.

Medium close up of iguana lounging on a branch with head partly in shade.

Prickly Pear cactus' green pads and spikes basking in orange light at sunset.

Tilt from a spindly, thorny cactus towards a large Saguaro cactus. Sun shining brightly in the sky.

Tilt from a spindly, thorny cactus towards a large Saguaro cactus. Sun shining brightly in the sky.

Shot panning a barbed wire barricade.

Antarctica Panning upwards shot of icicles hanging inside crevasse penetrated by icy blue light.

Sharp spines poking out of a cactus' green skin.