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22 hours ago · The orcas in the study took 1.2 to 1.3 breaths per minute while resting and 1.5 to 1.8 breaths per minute while traveling or hunting. Most dives lasted less than a minute, though one adult male ...
5 days 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.
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4 days ago · By Katherine Irving. published 26 May 2024. Our human ancestors arose in Africa due to many factors, including climate. Modern humans live all over the world, and there's evidence that our ...
2 days ago · marine biology, the science that deals with animals and plants that live in the sea. It also deals with airborne and terrestrial organisms that depend directly upon bodies of salt water for food and other necessities of life. In the broadest sense it attempts to describe all vital phenomena pertaining to the myriads of living things that dwell ...
- The Editors of Encyclopaedia Britannica
1 day ago · Published in Nature, these sequences uncover remarkable variation between the Y chromosomes of different species, showing rapid evolution, in addition to revealing previously unstudied regions of great ape genomes. Since these primate species are the closest living relatives to humans, the new sequences can provide insights into human evolution.
2 days ago · The first true mammals evolved in the shadows of dinosaurs and other large archosaurs that filled the world by the late Triassic. The first mammals were very small, and were probably nocturnal to escape predation.
4 days 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.
