"I don't know why you're on Mars, but whatever the reason for going to Mars is, I'm glad you're there and I wish I was with you."
That was a part of astrophysicist Carl Sagan's message, recorded a few months before he died in 1996, to the future human inhabitants of Mars.
Some of the earliest science fiction imagined voyages to the Red Planet. We now have the space-faring technology, and getting humans to Mars actually seems within reach. It would certainly involve massive resources and a lot of danger, but some believe the rewards would be massive.
Most of the diamonds synthesized from cremated remains come out blue, due to trace amounts of boron in the body. These diamonds, made from the ashes of animals, were created through the same process used to make diamonds from human remains.
Gov. Jerry Brown holds a chart showing California's average precipitation as he declares a drought state of emergency for the state Friday. Brown asked residents to voluntarily reduce water usage by 20 percent.
Saying that his state must take steps to plan for prolonged water shortages, Gov. Jerry Brown declared a state of emergency over an extended drought Friday. California faces "water shortfalls in the driest year in recorded state history," according to the governor's office.