Science Made Cooltag:typepad.com,2003:weblog-1701982016-02-20T11:47:43-05:00TypePad Evolution for Third-Graders tag:typepad.com,2003:post-6a00d8341d277753ef01b8d1a14f0f970c2016-02-20T11:47:43-05:002016-02-20T11:47:34-05:00It’s early on a Friday morning, and I’m standing in front of a crowd of eight-year-olds holding a fistful of dead crayfish. The mudbugs are a biological supply company purchase sorted into sealed sandwich bags – the subject and substrate...DianeAKelly