Paralititan stromeri was a giant titanosaurian sauropod dinosaur discovered in coastal deposits in the Upper Cretaceous Bahariya Formation of Egypt. The fossil represents the first tetrapod reported ... > more
The temperature record of the past 1000 years describes the reconstruction of temperature for the last 1000 years on the Northern Hemisphere. A reconstruction is needed because a reliable surface ... > more
The Raphinae are a subfamily of extinct flightless birds colloquially called didines or didine birds. They inhabited the Mascarene Islands of Mauritius and Rodrigues, but became extinct through ... > more
Mastodons or Mastodonts are members of an extinct genus Mammut of the order Proboscidea; they resembled, but were distinct from, the woolly mammoth. While mastodons were furry like woolly mammoths, ... > more
Limestone is a sedimentary rock composed largely of the mineral calcite (calcium carbonate: CaCO3). Limestones often contain variable amounts of silica in the form of chert or flint, as well as ... > 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
The pelycosaurs were smallish to large (up to 3 meters or more) primitive Late Paleozoic synapsid reptiles. They appeared during the Late Carboniferous and reached their acme in the early part of the ... > more