Most of the complex spatial and temporal relationships of periodical cicada broods and species must be less than 10,000 years old, because much of the current range of periodical cicadas in the eastern, Appalachian, and Midwestern U.S. would have been unsuitable for periodical cicadas during and for substantial periods following the Wisconsin ...
Just be sure not to serve her any Jell-O in the near future or your next class speaker may be a representative from PETA. Glue, historically, is indeed made from collagen taken from animal parts, particularly horse hooves and bones. In fact, the word âcollagenâ comes from the Greek kolla, glue.
years and years ago the horses Hoof was melted and used as glue. All of the unused animal parts that aren't fit for making hotdogs (horses don't usually end up in hotdogs) might end up as glue or gelatin. It is the protein that makes the glue sticky and the gelatin wiggly.