A contract investigator who tracks down crimes against endangered species finds a mammoth tusk that’s only 30 years old according to radiocarbon dating.
“Mammoth ivory,” the old man said, as if it was a proposition put up for debate. “I have hunt mammoth.”

Variants

(1)
  1. “Environmental Friendship Fossle” by Ian Stewart, in Analog, July/August 2006.
    2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . written by Ian Stewart