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  2. 3 hours ago · Cyanobacteria are ubiquitous in marine environments and play important roles as primary producers. They are part of the marine phytoplankton, which currently contributes almost half of the Earth's total primary production. [33] About 25% of the global marine primary production is contributed by cyanobacteria.

  3. en.wikipedia.org › wiki › BiodiversityBiodiversity - Wikipedia

    1 day ago · Biodiversity is commonly measured in terms of taxonomic richness of a geographic area over a time interval. In order to calculate biodiversity, species evenness, species richness, and species diversity are to be obtained first. Species evenness [209] is the relative number of individuals of each species in a given area.

  4. en.wikipedia.org › wiki › StonehengeStonehenge - Wikipedia

    1 day ago · Stonehenge is a prehistoric megalithic structure on Salisbury Plain in Wiltshire, England, two miles (3 km) west of Amesbury. It consists of an outer ring of vertical sarsen standing stones, each around 13 feet (4.0 m) high, seven feet (2.1 m) wide, and weighing around 25 tons, topped by connecting horizontal lintel stones.

  5. en.wikipedia.org › wiki › ObesityObesity - Wikipedia

    3 hours ago · Obesity is a medical condition, sometimes considered a disease, [8] [9] [10] in which excess body fat has accumulated to such an extent that it can potentially have negative effects on health. People are classified as obese when their body mass index (BMI)—a person's weight divided by the square of the person's height—is over 30 kg / m 2 ...

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