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Hace 19 horas · During the 19th century, however, resistance to the idea of extinction gave way to widespread acceptance following the discovery of the fossil remains of numerous previously unknown forms and direct experience with contemporary human-driven decline and the destruction of several species. In an effort to stem continued loss, ...
Hace 4 días · Radioactive decay occurs when an unstable nucleus has extra energy and becomes stable by releasing that energy as particles or rays. This process transforms the unstable nucleus, called the parent, into a stable nucleus, called the daughter.
Hace 1 día · In their paper, published in the journal Science Advances, Torsten Hauffe, Daniele Silvestro and Juan Cantalapiedra, describe how they used an AI application to provide insight into extinction ...
Hace 1 día · The Cretaceous–Paleogene (K–Pg) extinction event, also known as the Cretaceous–Tertiary (K–T) extinction, was the mass extinction of three-quarters of the plant and animal species on Earth approximately 66 million years ago.
Hace 2 días · Thorium is a chemical element. It has the symbol Th and atomic number 90. Thorium is a weakly radioactive light silver metal which tarnishes olive gray when it is exposed to air, forming thorium dioxide; it is moderately soft and malleable and has a high melting point.
Hace 2 días · Komodo dragons ( Varanus komodoensis) have long held interest for palaeontologists, because their serrated, blade-shaped teeth are similar to those of extinct meat-eating dinosaurs (theropod ...
Hace 19 horas · After extracting the NH3 abundances at this stage, we run a second single-point simulation, this time using the specific physical conditions for the envelope. These conditions include an envelope thickness set to 0.1 pc (5 × 1017 cm) assuming a visual extinction, AV, = 5 mag, n(H2) = 104 m−3 and. = 10 K.
