last thing the dinosaurs saw before they got extinct-ed

This helps explain why human-specialist predators, like Aedes aegypti, show widespread co-expression, while more generalist species, like mice and fruit flies, do not

We showed that non-canonical olfactory systems can be optimal if

-the environment is "noisy"
-behaviorally relevant odorants are correlated

Olfactory systems in model organisms follow a "one-receptor-to-one-neuron" rule. But mosquitoes (Aedes aegypti ) violate this rule--they co-express multiple receptor types per neuron.

Why?