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Young Voices for the Planet DVD in our online store includes 8 films where students speak out and take action on climate change.
As temperatures rise and soil moisture decreases, plants are stressed, which can lead to <a href="/php/tour_test_sqli.php?page=/earth/climate/crops_withering.html">crop withering</a>. <a href="/php/tour_test_sqli.php?page=/teacher_resources/online_courses/health/events_health.html">Droughts</a> accompanied by increased temperatures can lead to famine, social and political disruptions. Scientists are  helping with early identification of drought that might trigger food shortages. Watch the NBC Learn video - <a href="/php/tour_test_sqli.php?page=/earth/changing_planet/withering_crops_intro.html">Changing Planet: Withering Crops</a> to find out more.<p><small><em>Image taken by Tomas Castelazo, Creative Commons <a href=&quot;http://creativecommons.org/licenses/by/3.0/deed.en&quot;>Attribution 3.0 Unported</a> license.</em></small></p>An artist's rendering of the moment of impact of a massive <a
  href="/php/tour_test_sqli.php?page=/our_solar_system/meteors/meteors.html">meteorite</a>
  at the end of the Cretaceous (at the end of the <a
  href="/php/tour_test_sqli.php?page=/earth/geology/hist_mesozoic.html">Mesozoic
  Era</a>). Many
  scientists have concluded for decades that a meteorite four to six kilometers
  in diameter impacted the Earth at this time, resulting in a <a
  href="/php/tour_test_sqli.php?page=/earth/past/KTextinction.html">mass extinction
  of dinosaurs</a> and many other life forms.  Recent research suggests that
 perhaps <a
  href="/php/tour_test_sqli.php?page=/headline_universe/olpa/chicxulub.html">massive
  volcanic eruptions</a> may be been responsible for the extinction.<p><small><em>Courtesy of Don Davis, NASA</em></small></p>There are over 900 <a href="/php/tour_test_sqli.php?page=/the_universe/uts/megalith.html">rings of stone</a> located in the British Isles. The most famous of these stone rings is of course, <a href="/php/tour_test_sqli.php?page=/the_universe/uts/stonehenge.html">Stonehenge</a>.    The stones of Stonehenge were put in place between 3,000 B.C and 2,000 B.C. by neolithic people.Some speculate that the site was built as a temple of worship of the ancient Earth deities. Some say it was used as an <a href="/php/tour_test_sqli.php?page=/the_universe/uts/stonehenge_astro.html">astronomical observatory</a> of sorts. Still others say it was a burial ground.<p><small><em>  Image courtesy of Corel Photography.</em></small></p>Scientists are concerned that melting Arctic sea ice will increase the amount of fresh water in the <a href="/php/tour_test_sqli.php?page=/earth/polar/arctic_currents.html">Beaufort Gyre</a>, which could spill out into the Atlantic and cause major climate shifts in North America and Western Europe. Watch the <a href="/php/tour_test_sqli.php?page=/earth/changing_planet/freshwater_arctic.html">Changing Planet: Fresh Water in the Arctic video</a>.<p><small><em> Courtesy of Jack Cook, WHOI (<a href="http://www.whoi.edu">Woods Hole Oceanographic Institute</a>)</em></small></p>The spinning vortex of <a href="https://www.windows2universe.org/saturn/saturn.html">Saturn</a>'s north polar storm resembles a giant deep red rose surrounded by green foliage in this false-color <a href="http://www.nasa.gov/mission_pages/cassini/multimedia/pia14944.html">image</a> from NASA's <a href="https://www.windows2universe.org/missions/cassini.html">Cassini spacecraft</a>. The eye is 2,000 kilometers across with cloud speeds as fast as 150 meters per second.
It is not known how long this newly discovered north-polar <a href="https://www.windows2universe.org/earth/Atmosphere/hurricane/hurricane.html">hurricane</a> has been active.
The view was acquired at a distance of approximately 419,000 kilometers from Saturn.<p><small><em>NASA/JPL-Caltech/SSI</em></small></p>A group of
  Emperor penguins wait their turn to dive into the ocean near <a
  href="/php/tour_test_sqli.php?page=/people/postcards/jean_pennycook_11_29_0.html">Ross
  Island, Antarctica</a>
  on November 3, 2004.
Emperor penguins routinely dive to 500 meters in
  search of food.  Scientists are interested in understanding how they can
  endure the stress of these dives in such an <a
  href="/php/tour_test_sqli.php?page=/earth/extreme_environments.html">extreme
  environment</a>.<p><small><em> Image courtesy of Emily Stone,   National Science Foundation</em></small></p>

Windows to the Universe, a project of the National Earth Science Teachers Association, is sponsored in part by the National Science Foundation and NASA, our Founding Partners (the American Geophysical Union and American Geosciences Institute) as well as through Institutional, Contributing, and Affiliate Partners, individual memberships and generous donors. Thank you for your support! NASA AGU AGI NSF