Proper sequence of attaching jumper cables.

We donated ours to a local nonprofit org that rents them out. Such a cool group of film nerds running this operation. https://www.weluvvideo.org/

I have a Lower Paleolithic Acheulean bi-face hand axe likely made by Homo erectus. My father-in-law brought it back from Libya when he was working in oil fields in the late 1970s or early 1980s. I had it assessed by a lithic-specialist archeologist from the Witte Museum in San Antonio, Dr. Harry Shafer, who wrote a nice little report on the piece.

This was surprisingly good. https://youtu.be/ewvRS3NwIlQ

Yes, very typical.

As others have guessed, this is a bovid tooth, Bos taurus (cow).