Is it worth sending people to Mars when robots already go there safely and on the cheap?
Asks Vinny from Staten Island
A court with no judge, no jury and a controversial treatment of science takes center stage in the autism-vaccine debate.
Can brain science help determine the fates of adolescents accused of violent crimes?
Get video answers from Rob DeSalle, an evolution expert.
Asks Jukka from Medford, NJ
A new theory proposes a universe before ours.
With the help of robots, Joy Crisp is solving the mysteries of Mars.