Annalee Newitz, writing for io9.com:
More importantly, humans have continued the project that our grandparents and great-grandparents started in the 1950s when the Space Age began. Remember how that project got off the ground with remote-controlled satellites? Want to know why? Because that is how smart explorers do it. Believe it or not, we are actually clever enough monkeys that we are carefully doing a little reconnaissance in distant, dangerous places before we send people there. Which is why we have sent probes to Mars, the asteroid belt, Jupiter, Saturn, Neptune, Uranus, Pluto, and even to several moons and comets.
That’s a great way to think about it.
(via boing boing)