(Encyclopedia) hartebeesthartebeesthärˈtĭbēstˌ [key], large African antelope, Alcelaphus bucelaphus. The hartebeest resembles a horse with horns. It has a very long face and a small hump between the…
(Encyclopedia) Rift Valley fever, acute viral disease that affects domestic livestock and can be transmitted to humans. The disease is most common in E and S Africa, but also occurs widely in sub-…
As smart as a cassowary?Brain to body weightDinosaur brain power relative to a crocodile’sHow intelligent were dinosaurs? It is difficult to know how smart dinosaurs were because their brains…
What is this job like? Farmers grow crops and raise animals. American farmers run some of the most productive farms in the world. They sell their extra produce to other countries. Farmers decide…
(Encyclopedia) tunicatetunicatet&oomacr;ˈnəkĭt [key], marine animal of the phylum Chordata, which also includes the vertebrates. The adult form of most tunicates (also called urochordates) shows…
(Encyclopedia) ovumovumōˈvəm [key], in biology, specialized plant or animal sex cell, also called the egg, or egg cell. It is the female sex cell, or female gamete; the male gamete is the sperm. The…
