Scientists moved Saturday to prepare the world's largest atom smasher for exploring the depths of matter after successfully restarting the $10 billion machine following more than a year of repairs.

Astronaut Randolph Bresnik is a new dad again, after launching into space and taking a spacewalk, all for the first time.

Russian spaceship designer Konstantin Feoktistov, the only non-Communist space traveler in the history of the Soviet space program, has died at the age of 83.

A spacewalking astronaut put aside the impending birth of his daughter and blazed through his first-ever venture outside the International Space Station on Saturday.

Hackers break into the electronic files of one of the world's foremost climate research centers and post an array of e-mails which causes a stir among skeptics who say discussions show a conspiracy.