Sites like Facebook and Twitter also help if we have a problem. Someone in our group touched a strange plant and suddenly his skin was red and painful. I asked for advice 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 the modern explorers, communication like this really helps to make decisions and sometime it even saves lives.