Astronaut Group 21 will be the first people on Mars, if NASA has anything to say about it. And the new astronauts are nothing like the old.
A new study links human evolution all the way back to the first placenta-bearing mammals: the rat.
In order to address the individual and specific risk of a potential humanity killer, we would send out a scoping mission to probe its structure. And that would cost some money.
When Lee Harvey Oswald bought a bolt-action rifle in 1963 for under $20 and killed President Kennedy, gun legislation was passed five days later. This is President Obama's moment.