Search Results for: Bears

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6,727 results
  1. Humans

    The world population has now reached 8 billion

    In a first, the global population surpassed this milestone on November 15, according to a projection from the United Nations.

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  2. Planetary Science

    The last vital ingredient for life has been discovered on Enceladus

    The underground ocean on Saturn’s icy moon may contain phosphorus in concentrations thousands of times greater than those found in Earth’s ocean.

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  3. Paleontology

    Pterosaurs may have evolved from tiny, fast-running reptiles

    A mysterious little ground-dwelling reptile unearthed in a Scottish sandstone over 100 years ago turns out to be part of a famous flying family.

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  4. Archaeology

    How Asia’s first nomadic empire broke the rules of imperial expansion

    New studies reveal clues to how mobile rulers assembled a multiethnic empire of herders known as the Xiongnu more than 2,000 years ago.

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  5. Paleontology

    Ancient fish fossils highlight the strangeness of our vertebrate ancestors

    New fossils are revealing the earliest jawed vertebrates — a group that encompasses 99 percent of all living vertebrates on Earth, including humans.

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  6. Chemistry

    These chemists cracked the code to long-lasting Roman concrete

    Roman concrete has stood the test of time, so scientists searched ruins to unlock the ancient recipe that could help architecture and climate change.

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  7. Earth

    Indigenous people may have created the Amazon’s ‘dark earth’ on purpose

    Modern Amazonians make nutrient-rich soil from ash, food scraps and burns. The soil strongly resembles ancient dark soils found in the region.

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  8. Earth

    The Great Salt Lake is shrinking. What can we do to stop it?

    A dropping lake level affects agriculture, public health and the environment — but water conservation can halt the decline.

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  9. Climate

    Greta Thunberg’s new book urges the world to take climate action now

    Greta Thunberg's ‘The Climate Book’ covers the basic science of climate change, the history of denialism and inaction, environmental justice and solutions.

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  10. Readers ask about sea level rise, the universe’s first stars and more

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  11. Genetics

    Black Death immunity came at a cost to modern-day health

    A genetic variant that boosts Crohn’s disease risk may have helped people survive the 14th century bubonic plague known as the Black Death.

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  12. Anthropology

    Ancient footprints suggest a mysterious hominid lived alongside Lucy’s kind

    A previously unknown hominid species may have left its marks in muddy ash about 3.66 million years ago in what is now East Africa.

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