Urban ecosystem
An urban ecosystem is a complex, dynamic system in which natural and human-made components interact within a city or metropolitan area, producing…
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Évariste Galois
Évariste Galois was a fiery 19-year-old French revolutionary who, the night before a fatal duel, scribbled the ideas that founded modern abstract algebra and solved the 350-year-old riddle of which polynomial equations can be solved by radicals.
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Nature & Environment
Green economy
A green economy is an economic system that seeks to reduce environmental risks and ecological scarcities while promoting sustainable development…
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Nature & Environment
Emperor penguin
The emperor penguin (Aptenodytes forsteri) is the tallest and heaviest of all living penguin species, endemic to Antarctica.
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Nature & Environment
Grizzly bear
The grizzly bear (Ursus arctos horribilis) is a subspecies of the brown bear that inhabits the western United States, Canada, and Alaska, and is…
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Nature & Environment
Adélie penguin
The Adélie penguin (Pygoscelis adeliae) is a small, robust penguin species that breeds along the entire coast of Antarctica and is the most…
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Nature & Environment
Sustainable Development Goals
The Sustainable Development Goals (SDGs) are a set of 17 interlinked global objectives adopted by United Nations member states in 2015 to end…
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Nature & Environment
Temperate climate
A temperate climate is a climate zone characterized by moderate temperatures, distinct seasonal variations, and moderate precipitation, typically…
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Nature & Environment
White-tailed deer
The white-tailed deer (Odocoileus virginianus) is a medium‑sized cervid native to the Americas, renowned for its adaptability and status as the most…
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