In the past, when explorers arrived in a strange place, the first thing they did was to _____ 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 _____ 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 _____ , "Probably a Pushki plant. If it is, it'll hurt but it won't kill you!" In the age of modern explorer, _____ like this really helps to make decisions, and sometimes it even saves lives.