![](https://i.kinja-img.com/image/upload/c_fit,q_80,w_636/bf455623d107970894e54b1afe5537fb.jpg)
A rat with at least four testicles, one larger than its head, published in a scientific journal earlier this year.
A rat with at least four testicles, one larger than its head, published in a scientific journal earlier this year.
Jenny McGrath/Business Insider
Forrest Sheperd
Sergydv/Getty Images
Maiya Focht
Here’s something to chew on: a fossilized trilobite from the Ordovician Period, which is so well preserved that a team of paleontologists was able to identify its last meal, now mineralized in the creature’s fossil stomach.
ZHAO Chuang
Wu et al. PNAS 2019, doi.org/10.1073/pnas.1902396116
Mel Melcon / Los Angeles Times via Getty Images