Dan Riskin reports from Mission Control where the Pluto Fly By has happened. Now we wait for it to turn and take more images.

Why push the limits of the universe? We just want to know what's out there to be discovered. What would it be like to see Pluto.

Did you know Bill Nye, along with the Planetary Society, was one of the first to advocate for the New Horizons mission. He can't WAIT to see what it finds.

Author Nick Sagan hasn't seen his godfather, Frank Drake, in over 30 years. We capture their reunion - and find out how Drake became friends with Nick's famous father, Carl Sagan, in this exclusive clip.

What would receiving a message from an alien civilization tell us about human evolution, and about surviving the most serious problems facing our planet?

Author Nick Sagan hasn't seen his godfather, Frank Drake, in over 30 years. We capture their reunion - and find out how Drake became friends with Nick's famous father, Carl Sagan, in this exclusive clip.

Since launching in 2009, the Kepler program has detected hundreds of previously unknown planets. How many of them are Earth-like, and what does that mean for the probability of intelligent life beyond our solar system?

Since the 1960s, NASA has been keeping an eye on man-made objects in space. Here, engineers are replicating the devastating impact of space debris. 'Alien Encounters' airs Tuesdays at 10/9c.

Will ETs look like us? Will they resemble giant insects? Scientists debate how various environments could have created life forms beyond our wildest imagination.

It's possible that life on earth began off-planet and spread here.

If the chirality of aliens is different than ours, it couldn't interact with us, and therefore would be non threatening.

It's likely that an advanced civilization would combine the advantages of a machine with the advantages of biological systems.

An alien spacecraft might not rely solely on sunlight to power its trajectory. Find out what other energy technology aliens could use to travel through the universe.

Have you ever wondered how sushi is caught? From the sea to your restaurant table, catching sushi has become not only a delicacy but a difficult job.

When staying at a fancy hotel you expect a good hot shower. So how do hotels provide hot showers for the thousands of guests they have each day?

Deep sea diving is more dangerous than the movies make it seem. Find out how professional divers are trained to handle any situation.