While cellphone networks have managed to cover large swaths of the six most-populated continents, making a call from Antarctica isn’t so easy. Now, though, researchers in parts of Antarctica have a mobile communication option that goes beyond pricey satellite phones. A new system from Range Networks allows researchers to use ordinary cellphones to connect with one another, and even to the rest of the world, thanks to a satellite connection located at the base station. The system replaces what essentially were walkie-talkies that were used by researchers when away from their desks.