Rejoice! The machines won’t be taking over the world anytime soon, because doing the most basic of tasks still confounds them. I mean, have you thought lately about how hard it is to pick a ripe bell pepper? Fine, me neither. But researchers in Israel and Europe certainly have. They're developing a robot called Sweeper that can autonomously roam a greenhouse, eyeballing peppers to determine if they’re mature enough before sawing them off the plant and placing the produce in a basket.