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Hace 8 horas · The Cretaceous–Paleogene (K–Pg) extinction event, also known as the Cretaceous–Tertiary (K–T) extinction, was a sudden mass extinction of three-quarters of the plant and animal species on Earth, approximately 66 million years ago. The event caused the extinction of all non-avian dinosaurs.Most other tetrapods weighing more than 25 kilograms (55 pounds) also became extinct, with the ...
Hace 6 días · Perseverance rover on Mars (artist; 18 February 2021). The Mars 2020 mission, consisting of the rover Perseverance and helicopter Ingenuity, was launched on July 30, 2020, and landed in Jezero crater on Mars on February 18, 2021. As of May 8, 2024, Perseverance has been on the planet for 1144 sols (1175 total days; 3 years, 80 days). Ingenuity operated for 1042 sols (1071 total days; 1 year ...
Hace 5 días · Ichthyosauria ( / ˌɪkθiəˈsɔːriə /; Ancient Greek for "fish lizard" – Ancient Greek: ἰχθύς, romanized : ichthys, lit. 'fish' and Ancient Greek: σαῦρος, romanized : sauros, lit. 'lizard') is an order of large extinct marine reptiles sometimes referred to as "ichthyosaurs", although the term is also used for wider clades in ...
Hace 5 días · According to that work, in 565 ad the monster bit a swimmer and was prepared to attack another man when Columba intervened, ordering the beast to “go back.” It obeyed, and over the centuries only occasional sightings were reported. Many of these alleged encounters seemed inspired by Scottish folklore, which abounds with mythical water creatures.
Hace 1 día · Answers. 1. But there is something about Mars, in particular, that has always captured the imagination. Through a small telescope, dark patches can be seen against the Red Planet's disc. Mars is a ...
Hace 5 días · Mars 1 was a modified Venera-type spacecraft in the shape of a cylinder 3.3 m long and 1.1 m in diameter with a mass of 893.5 kg. The spacecraft measured 4 meters across with the solar panels and radiators deployed. The cylinder was divided into two compartments. The upper 2.7 m, the orbital module, contained guidance and on-board propulsion ...
Hace 5 días · Where did the water that flowed on Mars over 4 billion years ago go? Despite the 2018 discovery of a vast underground lake beneath the Martian ice sheet, scientists are struggling to find...
