The Permian-Triassic (P-T or PT) extinction event, sometimes informally called the Great Dying, was an extinction event that occurred approximately 251.0 million years ago (mya), forming the boundary ... > more
The Neanderthal or Neandertal was a species of Homo (Homo (sapiens) neanderthalensis) that inhabited Europe and parts of western Asia from about 230,000 to 29,000 years ago, during the Middle ... > more
This timeline of the evolution of life outlines the major events in the development of life on the planet Earth. Dates given are estimates based on scientific evidence.
In biology, evolution is the ... > more
Rodentia is an order of mammals also known as rodents, characterised by two continuously-growing incisors in the upper and lower jaws which must be kept short by gnawing.
Forty-percent of mammal ... > more
Homo ergaster ("working man") is an extinct hominid species (or subspecies, according to some authorities) which lived throughout eastern and southern Africa between 1.9 to 1.4 million years ago with ... > more
A supervolcano refers to a volcano that produces the largest and most voluminous kinds of eruption on Earth. The actual explosivity of these eruptions varies, but the sheer volume of extruded magma ... > more
Carbon-14, 14C, or radiocarbon, is a radioactive isotope of carbon discovered on February 27, 1940, by Martin Kamen and Sam Ruben. Its nucleus contains 6 protons and 8 neutrons. Its presence in ... > more
Reptiles (also called 'herps') are tetrapods and amniotes, animals whose embryos are surrounded by an amniotic membrane. Reptiles were defined as the set of animals that includes crocodiles, ... > more
Homo is the genus that includes modern humans and their close relatives. The genus is estimated to be between 1.5 and 2.5 million years old. All species except Homo sapiens are extinct. Homo ... > more
The timeline of human evolution outlines the major events in the development of humans species and the evolution of human's ancestors. It begins with the time of the origin of life and presents a ... > more