Allosaurus (/ˌæləˈsɔːrəs/[1][2]) is a genus of large theropod dinosaur that lived 155 to 150 million years ago during the late Jurassic period (Kimmeridgian to early Tithonian[3]). The name “Allosaurus” means “different lizard”. It is derived from the Greek ἄλλος/allos (“different, other”) and σαῦρος/sauros (“lizard / generic reptile”). The first fossil remains that can definitely be ascribed […]
Apatosaurus (/əˌpætəˈsɔːrəs/;[1][2] meaning “deceptive lizard”) is a genus of extinct sauropod dinosaurs that lived in North America during the Late Jurassic period. Othniel Charles Marsh described and named the first-known species, A. ajax in 1877, and a second species, A. louisae, was discovered and named by William H. Holland in 1916. They lived about 152 […]
Stegosaurus (/ˌstɛɡəˈsɔːrəs/[1]) is a genus of armored dinosaur. Their fossil bones have been found in rocks dated to the Late Jurassicperiod (Kimmeridgian to early Tithonian ages), between 155 and 150 million years ago, in the western United States and Portugal. Several species have been classified in the upper Morrison Formation of the western U.S, though only […]
An ice age is a period of long-term reduction in the temperature of Earth‘s surface and atmosphere, resulting in the presence or expansion of continental and polar ice sheets and alpine glaciers. Within a long-term ice age, individual pulses of cold climate are termed “glacial periods” (or alternatively “glacials” or “glaciations” or colloquially as “ice […]
Climate change is a change in the statistical distribution of weather patterns when that change lasts for an extended period of time (i.e., decades to millions of years). Climate change may refer to a change in average weather conditions, or in the time variation of weather around longer-term average conditions (i.e., more or fewer extreme […]
Mamenchisaurus (/mɑːˈmʌntʃiˈsɔːrəs/ mah-mun-chi-sawr-əs,[1] or spelling pronunciation /məˌmɛntʃiˈsɔːrəs/) is a sauropod dinosaur genus including several species, known for their remarkably long necks[2] which made up half the total body length.[3] It is known from numerous species which ranged in time from 160 to 145 million years ago, from the Oxfordian to Tithonian ages of the late […]