Hayabusa returns with Asteroid Dust Sample!
Excerpt: "NASA scientist Paul Abell, who monitored the return, said Hayabusa was significant from in terms planetary defense, bearing in mind an asteroid impact is thought to have wiped out the dinosaurs. Knowing the physical characteristics of near-Earth asteroids would be useful "in case we see something coming at us in the future," he said. As leftover matter from the building of the solar system, he added, asteroids could also tell us about its formation and possibly the origins of life."
Interesting Chronology of Space Solar Power and Solaren
Upcoming July 8-9 Meeting of Adhoc Planetary Defense Group