Molnar Airport (image) Princeton University Caption The researchers estimated the "fundamental thermal niche" of a parasite, the area between the lowest and highest temperature in which a specific parasite prospers. An organism already living at the high end could die out when things heat up. Parasites lingering at the low end could extend to new areas, which would expose human and animal populations to new diseases. Credit Illustration by Matilda Luk Usage Restrictions None Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.