Nothing can ruin a backyard get-together faster than a swarm of mosquitoes. So, each summer, we prepare to do battle: body sprays, yard sprays, citronella candles...yet even with all these expensive weapons we still end up covered in bug bites!
Where will the next generation of biology nerds come from? Practically every biologist I know started out as a kid who looked at creatures they found in gardens and rock pools, in parks and dark corners.
Each person (and other animal) exudes a cocktail of carbon dioxide and other emanations, and we also emit heat. Mosquitoes may discern any of us as human beings, but some of us will have a more attractive signature than others.