Our work on light bulbs wasn't an arbitrary mandate. We didn't just pick a standard out of the air, or look for a catchy sounding standard like 25 by 2025 not based in science or feasibility. Instead, we worked with both industry and environmental groups to come up with a standard that made sense and was doable.

Some ideas you have to chew on, then roll them around a lot, play with them before you can turn them into funky science fiction.

I would love to photograph Stephen Hawking. I am just fascinated by science, I really am.

Science goes from question to question big questions, and little, tentative answers. The questions as they age grow ever broader, the answers are seen to be more limited.

Paleoanthropology is not a science that ends with the discovery of a bone. One has to have the original to work with. It is a life-long task.