Russians toss satellites and install animal tracking system in marathon spacewalk

News Brief: Russian cosmonauts Oleg Artemyev and Sergey Prokopyev tossed four small research satellites into orbit and installed an animal-tracking sensor system known as Icarus on the International Space Station’s exterior today, during a spacewalk that ran more than an hour longer than planned. Getting the hardware installed for Icarus, which will track migrating animals that have been tagged with GPS receivers, was the main factor behind the spacewalk’s extension from an expected six hours to seven hours and 46 minutes. The spacewalkers also retrieved material science samples from the station’s exterior.