In the past, when explorers arrived in a strange place, the first thing they did was to put up their tents or cook a meal. But nowadays, when explorers arrive in a new place, they log on to their social networking site using a satellite phone. Explorers in the past wrote about their adventures in books which were published months or years later. Nowadays, we post a message in seconds. Sites like Facebook and Twitter also help if explorers have a problem. Someone in our group touched a strange plant and suddenly his skin was red and painful. I asked for _____ on Twitter: "Hand touched a strange plant. It's red and hot. Any advice?" Minutes later, someone who knew the region replied, "Probably a Pushki plant. If it is, it'll hurt but it won't kill you!" In the age of modern explorer, communication like this really helps to make decisions, and sometimes it even saves lives.