Is there a safe time to let your kids play tackle football? That has yet to be determined, but a new study suggests you may want to wait until they are at least 12 years old.
The asteroid that flew past Earth on Monday was not traveling alone. As you can clearly see in the image above, it was accompanied by its very own mini-moon.
Pluto, get ready for your close-up.
Rosetta's journey with a comet has already revealed a dark world far more complex than scientists had realized.
It's a sea turtle mystery that has stumped scientists for decades: How does the female sea turtle, which travels across thousands of miles of open ocean each year, still manage to navigate back to the same beach where she hatched to lay her eggs?
Let the data collection begin! NASA's New Horizons spacecraft has finally started the first science phase of its mission to get up close and personal with the dwarf planet Pluto.