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.
In 2020, Mexico joined 150 nations committing to protect 30% of its territory by 2030 as part of the global 30x30 initiative. More than halfway through the decade, there is ongoing debate about how to effectively expand protected ...
Plants & Animals
Aug 28, 2026
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12
Female humpback whales off the coast of Brazil now have their pick of mates, who slap the water with their tails and jostle for attention—a scene that would have been unthinkable a few decades ago.
Plants & Animals
Aug 28, 2026
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Researchers have developed fluorescent molecules that permit imaging of how DNA is packaged inside living cells at unprecedented resolution and, in preserved cells, at a resolution close to the width of the double helix itself.
Biotechnology
Aug 28, 2026
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43
The confirmation of Australia's first mainland death of a mammal from bird flu last week highlights New Zealand's challenge in managing the deadly H5N1 strain of the virus.
Veterinary medicine
Aug 28, 2026
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5
Eagles are symbols of hunting prowess. Known as top predators wherever they live, they are often assumed to kill as their primary mode of obtaining food. However, a new study published in the Journal of Raptor Research reports ...
Plants & Animals
Aug 28, 2026
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145
H5N1 bird flu has been detected in a dead dolphin in South Australia, state officials said Friday, the first case of its kind in the country.
Ecology
Aug 28, 2026
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10
The southern humpback whale migration is in full swing. Tens of thousands of whales are now making their journey from warm Australian waters in the north to their cold feeding grounds in Antarctica.
Plants & Animals
Aug 27, 2026
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11
The genome—which contains genes encoded in DNA—acts as the fundamental blueprint of life. But what you might not know is that, in addition to this genetic information, we have something akin to an "instruction manual" for ...
Cell & Microbiology
Aug 27, 2026
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10
The deadly rabies virus was once common across Europe. A bite from an infected dog, wolf or fox could be fatal.
Plants & Animals
Aug 27, 2026
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7
A research team has uncovered fundamental molecular mechanisms governing the formation of tendons and ligaments, which are essential for musculoskeletal integration. Understanding these mechanisms could pave the way for the ...
Molecular & Computational biology
Aug 26, 2026
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