“Climate change is happening, humans are causing it, and I think this is perhaps the most serious environmental issue facing us.”
“Humor is everywhere, in that there's irony in just about anything a human does.”
“When we see the shadow on our images, are we seeing the time 11 minutes ago on Mars? Or are we seeing the time on Mars as observed from Earth now? It's like time travel problems in science fiction. When is now when was then?”