What Seedbare didn't say is the reason they are harmless to us, in spite of their super deadly venom, is that their fangs are too small to pierce our skin. So althought they may creep you out, you don't have to worry about them. Hey Seedbare, it's nice to see another biologically informed person on the board! Loved your piece on CO2. May I ask your age? I'm 58, first time around in college I was a bio major--2nd time psych.