What Is It? The Weekly Challenge #4 Answer

This weeks challenge was to figure out which, in the picture below, was a mammoth, and which was a mastodon. This weeks challenge was correctly guessed by two people, both Ilyssa A. and Masaki K., who both said mammoth on the left and mastodon on the right.  However, how can you differentiate between the two?  Obvious, we have two super-sleuth paleontologists on our hands who can differentiate, but I'm guessing that the vast majority of you might have trouble.  So here is a quick Mammoth Vs. Mastodon Guide, with just a few helpful ways to differentiate between the two.

A size comparison of a mammoth and a human, myself, at the excellent zoo called The Living Desert in California.  Photo Credit: Julie Neher

Check in a few hours for this weeks challenge!