Mammals (from Latin mamma, 'breast') are a group of vertebrate animals constituting the class Mammalia (/məˈmeɪliə/), and characterized by the presence of mammary glands which in females produc…
Human evolutionary genetics studies how one human genome differs from another human genome, the evolutionary past that gave rise to the human genome, and its current effects. Differences between ge…
Ecology is the study of organisms and how they interact with the environment around them. An ecologist studies the relationship between living things and their habitats. In order to learn about the…
Updated for 2013, Reptiles and Dinosaurs, is one book in the Britannica Illustrated Science Library Series that covers today's most popular science topics, from digital TV to microchips to touchscr…
Humans are, of course, animals—more particularly, members of the order Primates in the subphylum Vertebrata of the phylum Chordata. Like all chordates, the human animal has a bilaterally symmetri…
There is often confusion between weather and climate. Weather is the condition of the atmosphere at a particular place over a short period of time. For example, on a particular day in Trinidad, the…
An earthquake (also known as a quake, tremor or temblor) is the shaking of the surface of the Earth resulting from a sudden release of energy in the Earth's lithosphere that creates seismic waves. …
Aquatic Plants hese plants are especially adapted for living in ponds, streams, lakes, and rivers—places where other land plants cannot grow. Although aquatic plants belong to many different fami…