Most birds, and by that we mean 97 percent of all species, don’t have external genitalia and instead have what’s known as a cloaca (as did dinosaurs ). Seen in birds, reptiles, amphibians, some fish, ...
Antibiotics are a double-edged sword – they should be as toxic as possible to pathogenic bacteria while being harmless to the cells of the human body. An international research team led by the ...