A newly discovered invasive flatworm has concerned scientists as they worry about the effects it could have on your backyard’s ecosystem. Spider season is officially here, and while we now know how to deal with them, it doesn’t make their presence any less horrifying. But while you’re figuring out how to deal with your arachnid problem, you might consider learning about another critter who is stalking your backyard. Don’t worry, it’s not the wasp that bursts from the bodies of other insects. The invasive flatworm eats other invertebrates Just a few days after a woman was “nearly killed” by a c…