Cats rely heavily on smell, with estimates commonly cited in the tens of millions of olfactory receptors (often ~45–80M). For comparison, humans are often estimated around ~5–6M, which helps explain why scent marking and food aroma matter so much to cats.
🤯 "A cat’s nose has 45-80 million scent receptors — yet somehow they still “don’t smell” the litter box they just nuked."