Yet, as you get closer to humans on the evolutionary tree, tails disappear ... which have to pour energy into every step they take, two legs take advantage of gravity, which does some of the ...
Years later, this tale of two tails is still going strong. Best of friends, Buddy and Princess share a pillow at night with their adopted human and are looking forward to years of happiness in ...
Why don't humans have tails? Since tails first evolved at least ... which have to pour energy into every step they take, two legs take advantage of gravity, which does some of the work for us.
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