When I was very young, we had a vacation home, rarely used...I remember the stereo was playing by a window while I was outside, and I saw this huge turtle standing on the porch right under the window, his head stretched as far up as he could get it, like a pointer. He seemed completely hypnotized by the music.
So I’ve always thought that turtles are smarter than they appear.
They have far more chromosomes than humans, IIRC.