Mammals are a vertebrate class (Mammalia) characterized by endothermy, hair or fur, and the presence of mammary glands that produce milk to nourish offspring. They possess a neocortex, three middle ear ossicles, and a single-boned lower jaw articulating with the squamosal bone. Most exhibit viviparity with complex placentation (except monotremes, which are oviparous) and show determinate growth with advanced parental care and social behaviors. Mammalian physiology includes high metabolic rates, a four-chambered heart, and differentiated dentition, supporting ecological diversification into terrestrial, aerial, and aquatic niches across nearly all biomes.
A new resilience test for merino sheep is using hereditary markers to help producers identify which animals are better able to cope with stressors in their environment.
Plants & Animals
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Sightings of humpback whales off Rio de Janeiro's coast are surging as they recover from decimation due to commercial whaling, prompting an acceleration in the demand for whale-watching excursions to spot the huge marine ...
Ecology
8 hours ago
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The more people expand into previously natural areas, the more wildlife and humans step on each other's toes, leading to more interactions that may result in conflict. This includes national parks, where people flock to recuperate ...
Plants & Animals
12 hours ago
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Bugs run rampant in the summer, and if you have ever suffered a mosquito bite and regretted not putting on bug spray, you should know about nature's insect repellent: the Indiana bat. Federally endangered since 1967, the ...
Plants & Animals
19 hours ago
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Superworms, a mealworm-like form of beetle larva commonly used as pet food, are efficient cleaners of skeletons, according to a study published in PLOS One by Fatemeh Rastekar of Ferdowsi University of Mashhad, Iran, and ...
Plants & Animals
19 hours ago
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In the northern hemisphere, the summer season is rolling in, and the heat is on the rise. For horses, these high temperatures also mean an increased risk of respiratory issues, such as recurrent laryngeal neuropathy (RLN).
Plants & Animals
20 hours ago
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Human evolution is generally explained through changes in brain size, locomotion or tool use, but new research from Wits University suggests that gum disease and changes in facial structure may have been important factors ...
Evolution
20 hours ago
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A new study of wild bats reveals that an animal's immune system is shaped by more than its need to fight infections. Researchers from the University of Maryland have found that sex, age and competition for mates influence ...
Evolution
21 hours ago
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A Korean research team has developed a new viral vector technology that significantly improves the production efficiency of next-generation cell and gene therapies known as CAR immune cell therapies, which are designed to ...
Cell & Microbiology
22 hours ago
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In cancer research, one person's junk is increasingly becoming another person's treasure. Scientists have uncovered new evidence showing how recently evolved "junk DNA" genetic elements can become integrated into ancient ...
Evolution
22 hours ago
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