UK photographer visits greenhouse to snap spiny succulents

"There are no planetary free lunches"

Geometric sculptures of animals crafted in paper

Astronaut publishes book of awe-inspiring space photography

This is Dendrogramma enigmatica. And as its name suggests, it's quite the enigma.

Secular climate change activists can learn from evangelical Christians

Chef and sustainable food advocate presents radical new vision for food

Wanderlust-y photos of travels around the globe