The grave of a Celtic female who was buried in approximately 200 B.C. has revealed a surprising find — she was buried in a tree coffin and adorned with precious jewelry.

From 450 B.C. to 58 B.C.—exactly the time period in which the tree coffin woman and her potential male companion lived—a “wine-guzzling, gold-designing, poly/bisexual, naked-warrior-battling ...