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4 days ago · 3D reconstructions suggest that simple marine animals living over 560 million years ago drove the emergence of more complex life by mixing the seawater around them. It’s exciting to learn that the very first animals from 580 million years ago had a significant impact on their environment, despite not being able to move or swim. A study ...
4 days ago · Proto-Mammals 308 Therapsid: Limbs beneath the body and other mammalian traits 280 Class: Mammalia: Mammals: 220 Subclass: Theria: Mammals that give birth to live young (i.e., non-egg-laying) 160 Infraclass: Eutheria: Placental mammals (i.e., non-marsupials) 125 Magnorder: Boreoeutheria
1 day ago · The narwhal is an agile and medium-sized whale. Adult males are around 4.1 m (13 ft) long from nose to tail tip, and females average 3.5 m (11 ft); the overall body length of 3.0 to 5.5 m (9.8 to 18.0 ft) is suggested for both males and females.
1 day ago · The lack of migration out of these semi-enclosed seas seems to have persisted long enough to make the latter two populations ... D. W. Marine Mammals of the ... Evolution (N. Y.) 58 ...
1 day ago · The Cretaceous–Paleogene ( K–Pg) extinction event, [a] also known as the Cretaceous–Tertiary (K–T) extinction, [b] was a sudden mass extinction of three-quarters of the plant and animal species on Earth, [2] [3] approximately 66 million years ago. The event caused the extinction of all non-avian dinosaurs.
4 days ago · Sperm whales attain sexual maturity at 7 to 13 years of age and physical maturity at 25 to 45 years and have been recorded to live as long as 62 years. They feed primarily on cephalopods, including the giant squid ( Architeuthis dux ). The sperm whale is the most evolutionarily modified of the toothed whales.
4 days ago · What is Marine Biology? Marine biology is a scientific discipline that focuses on the study of marine organisms, their behaviors, interactions, and the marine ecosystems they inhabit. It encompasses a wide range of sub-disciplines, including marine ecology, marine conservation, marine physiology, and marine genetics.
