What is yellow fever? – History of medicine
Kids with yellow fever in Mississippi about 1870. See how all the people are white? The hospital wasn't letting black kids in, or hiring black women as nurses. Where did [...]
7
09, 2017
7
09, 2017
What is malaria? History of diseases and medicine
A baby with malaria (from World Health Organization) - Malaria history How do you get malaria? You catch malaria by being bitten by a mosquito that has malaria parasites living inside it. [...]
6
09, 2017
What is dengue fever? History of disease and medicine
Dengue history: the dengue virus - magnified many times Dengue history Probably dengue fever didn't exist before the late 1700s AD, so in the ancient and medieval worlds there was no [...]
25
05, 2017
Why do mosquitoes bite? Biology
Mosquitoes bite people: A mosquito on human skin Like bees, mosquitoes evolved from earlier flies and dragonflies about 200 million years ago, during the Jurassic period. Mosquitoes have six legs like [...]
25
05, 2017
What are arthropods? Biology
Bee on a flower What are arthropods? Insects, spiders, crabs, and lobsters are all arthropods, so there are a lot of arthropods on Earth. Annelid worms All our biology articles [...]
