NASA astronaut Scott Kelly and Russian cosmonaut Mikhail Kornienko are one-third of the way through a record-breaking year-long mission in space. 

On "America's News Headquarters" today, Elizabeth Prann checked in with the astronauts to see how the men are holding up in space. 

"We're one-third of the way into this and I think 'Misha' would agree, we both feel like we've been up here for a really long time," Kelly said.  

He added that they have a "pretty good capability" to stay connected with their family and friends via telephone and Internet. 

Kelly is studying the effects of micro gravity on the body and is a human guinea pig with his twin brother, retired astronaut Mark Kelly. 

NASA is comparing and contrasting what happens to their bodies and brains while one is in space and the other is on the ground. 

This is the first time anyone has ever spent a year on the International Space Station.

Watch the video above to hear more from the astronauts on "America's News Headquarters."

Identical Twin Astronauts Ready for Historic, Year-Long Mission

Astronauts Headed to Space For Year-Long Mission