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4 days ago · v. t. e. The Cambrian explosion (also known as Cambrian radiation [1] or Cambrian diversification) is an interval of time approximately 538.8 million years ago in the Cambrian period of the early Paleozoic when there was a sudden radiation of complex life, and practically all major animal phyla started appearing in the fossil record.
6 hours ago · Marine mammals probably also forced penguins to wear their characteristic black and white attire. A well-preserved fossil has revealed that the colours are a more recent invention. The evidence surfaced in a desert near the coast of Peru in 2010. Researchers found the only penguin fossil to date with preserved feathers.
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1 day ago · The evolution of mammals has passed through many stages since the first appearance of their synapsid ancestors in the Pennsylvanian sub-period of the late Carboniferous period. By the mid- Triassic, there were many synapsid species that looked like mammals. The lineage leading to today's mammals split up in the Jurassic; synapsids from this ...
2 days ago · There is only one species of walrus alive today, but in the past there were many others. The diversification of seals was once thought to have been fairly steady and relatively uninteresting. But a new study looking into the evolution and diversity of these marine mammals has found that walruses stand out as having been quite dynamic.
5 days ago · marine ecosystem, complex of living organisms in the ocean environment. Marine waters cover two-thirds of the surface of the Earth. In some places the ocean is deeper than Mount Everest is high; for example, the Mariana Trench and the Tonga Trench in the western part of the Pacific Ocean reach depths in excess of 10,000 metres (32,800 feet).
5 days ago · Richard Sabin, Principal Curator of Mammals at the Museum, notes that Steller's sea cow, Hydrodamalis gigas, remains enigmatic from a natural history perspective, adding to its allure.
1 day ago · These amphibians have evolved teeth specifically suited to their particular lifestyles. The teeth found in frogs and toads are very different from the teeth of mammals. Instead of being used for chewing and grinding food, they serve other important functions. One of the most common uses for frog and toad teeth is catching and holding prey.
