Mammals cannot because we breathe air (some animals like shrews and moles 'cheat' by blowing air bubbles which they inhale). Fishes can. Sharks in particular have very keen senses of smell; some can even detect blood in as little of a concentration as one part per million. Their sense of smell is also directional, since their nasal ducts aren't fused, so they can pinpoint the direction of smell like how we pinpoint sound with our two ears.
Mammals cannot because we breathe air (some animals like shrews and moles 'cheat' by blowing air bubbles which they inhale). Fishes can. Sharks in particular have very keen senses of smell; some can even detect blood in as little of a concentration as one part per million. Their sense of smell is also directional, since their nasal ducts aren't fused, so they can pinpoint the direction of smell like how we pinpoint sound with our two ears.
We should be able to hit upon Pola with this.Like a shark, right?Well it is somewhat like blood to her...Since it's come to this, I'll drop some alcohol into the ocean, and lure her out.Sharks have good noses, and go towards the smell of blood, it seems!
