Discovery Communications has tapped new leaders for Science Channel and Destination America.

Marc Etkind is moving into the general manager post at Science after serving in the same capacity at Destination America. Jane Latman, formerly g.m. of Discovery Life Channel, will succeed Etkind, and she will continue to perform double duty as senior VP of development for Investigation Discovery channel.

The change Science comes on the heels of Rich Ross expanding his oversight of Discovery turf in August from the mothership channel to include Animal Planet and Science. Rita Mullin had been g.m. of Science for the past 18 months. She has left the company.

“Marc has a strong record of programming successes and a fascinating background in science,” Ross said. “He has an instinct for what audiences want to watch and is well positioned to lead Science Channel.”

Science had a busy morning coinciding with Etkind’s announcement as the channel took the rare step of going live at 11:30 a.m. ET to cover NASA’s announcement of the discovery of flowing water on Mars.

Etkind is based in New York. He was part of the team that launched Destination America, a redo of the former Planet Green channel, in 2011. Before that he worked as a development VP at Animal Planet. Prior to joining Discovery Communications Etkind worked for History as a docu producer and as an exhibit curator for Chicago’s Museum of Science and Industry.

Latman’s role at Discovery Life changed when Discovery’s cable group realigned in August and the TLC team took on oversight of Discovery Life. She reports to Henry Schleiff, group president of Investigation Discovery, American Heroes Channel and Destination America.