A Mouse Immune to Mouse Poison
Earlier this summer, we stumbled upon this newly-poison-resistant house mouse, which can now survive some of mankind's deadliest rodenticide thanks to some very recent hybridization-as-evolution. Warfarin, a common mouse poison, works on most species of mouse, including the common house mouse, but it doesn't work on the Algerian mouse, a separate though closely related species found on the Mediterranean coast. The two mouse species would never normally have met, but human travel introduced them, and the inevitable hybrid mouse began popping up in Germany, safe and sound--due to this new beneficial trait.