More than 300 million years ago, all sorts of arachnids crawled around the Carboniferous coal forests of North America and Europe. These included familiar ones we'd recognize, such as spiders, harvestmen and scorpions—as ...
Paleontology & Fossils
May 17, 2024
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A new study sheds light on how climate change and human development threaten mammal species living in isolated biodiversity hotspots known as "sky islands."
Plants & Animals
Apr 29, 2024
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15
A study led by the University of Stirling jointly with the University of Wisconsin-Madison has shed new light on cross-species virus spillovers that can cause pandemics.
Plants & Animals
Apr 23, 2024
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38
The southern pygmy perch hadn't been seen in Bendigo Creek since the mid-19th-century goldrush, when a booming town sprang up around the central Victorian waterway. This attractive small fish, which displays bright colors ...
Ecology
May 13, 2024
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7
How do city residents feel about animals in their immediate surroundings? A recent study published in the Journal of Urban Ecology by the Technical University of Munich (TUM), the University of Jena and the Vienna University ...
Ecology
May 8, 2024
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1
The Earth now supports over eight billion people who collectively have transformed three-quarters of the planet's land surface for food, energy, shelter and other aspects of the human enterprise.
Ecology
May 2, 2024
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7
Current concentrations of carbon dioxide (CO₂) in Earth's atmosphere are unprecedented in human history. But CO₂ levels today, and those that might occur in coming decades, did occur millions of years ago.
Earth Sciences
May 1, 2024
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4
In biology, a species is:
There are many definitions of what kind of unit a species is (or should be). A common definition is that of a group of organisms capable of interbreeding and producing fertile offspring, and separated from other such groups with which interbreeding does not (normally) happen. Other definitions may focus on similarity of DNA or morphology. Some species are further subdivided into subspecies, and here also there is no close agreement on the criteria to be used.
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