For years, has been widely understood that the carbon dioxide in our breath attracts mosquitoes like moths to a flame. Every time we exhale, we release carbon dioxide into the air; mosquitoes can smell it from over 30 feet away. The frequency of our exhalation and the amount of carbon dioxide we emit depends on the individual, our activity level and our chemical makeup.
A new study by researchers at Oregon State University shows that the type of mosquitoes that carry malaria, anopheline mosquitoes, were present on the Earth 100 million years ago. That's older than some dinosaurs, which scientists say lived as recently as 66 million years ago.