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  • Climate change widespread, rapid, and intensifying – IPCC
    GENEVA, Aug 9 – Scientists are observing changes in the Earth’s climate in every region and across the whole climate system, according to the latest Intergovernmental Panel on Climate Change (IPCC) Report, released today
  • Khan Academy
    If you're seeing this message, it means we're having trouble loading external resources on our website If you're behind a web filter, please make sure that the domains * kastatic org and * kasandbox org are unblocked
  • Climate change impacts worse than expected, IPCC 1. 5 report . . .
    In addition, depending on how fast emissions are cut, between 0 4 and 2 7 million square miles (1-7 million square kilometers) of land may have to be converted to growing bioenergy crops and up to
  • Earth’s greatest hits: A history of asteroid impacts
    The object may have been as large as 8 miles (13 km) across which wiped out an estimated 70 to 80 percent of all species on Earth, including the dinosaurs Scientists believe this crater
  • Scientists warning to humanity on tree extinctions
    Recently, Cazzolla Gatti et al have estimated the total number of tree species worldwide, again using statistical extrapolation from forest inventory plots, using a database of more than 100,000 such plots distributed worldwide Results suggested that there may be ∼73,000 tree species globally, which suggests that thousands of species remain
  • Milankovitch (Orbital) Cycles and Their Role in Earth’s Climate
    The difference in the distance between Earth’s closest approach to the Sun (known as perihelion), which occurs on or about January 3 each year, and its farthest departure from the Sun (known as aphelion) on or about July 4, is currently about 5 1 million kilometers (about 3 2 million miles), a variation of 3 4 percent
  • How to Calculate the Circumference of Earth - Tutors. com
    The earth, as we said, is an oblate spheroid, so geodesists (scientists who measure the earth and its position in space) have measured and calculated the average of earth's circumference as 40,075 km or 24,901 mi Eratosthenes, some 2,200 years ago, was off by only 125 km or 101 mi And he did it with just a little knowledge about geography and





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