One time on a thru hike in Antarctica I came across what looked like a lump of shit. But there’s no large animals in Antarctica, it was a meteorite.
https://podcasts.apple.com/us/podcast/ep-208-the-land-way-do...
Here's an article that also interviews Ralph Harvey:
https://www.nbcnews.com/science/space/hunt-meteorites-resear...
Good: dogs have no business being in Antarctica. Usually, they turn out to be dangerous alien shape-shifters.