π¬ Cats use urine for chemical ID cards
Scientists discovered that cats use 13 unusual fatty acids in their urine as a chemical 'ID card' to recognize each other. This was found by researchers from Japan, Germany, and Spain studying domestic cats. The unique mixture of these fatty acids remains stable in urine for at least 24 hours. This suggests cats possess long-term memory for specific urine scents from different individuals. Future research will explore how BFAs stored in kidney lipids are released into urine.