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We now offer the Cool It! card game in our Science Store. Cool It! is the new card game from UCS that teaches kids about the choices we have when it comes to climate change.
Leonardo da Vinci's: "Leda and Her Two Sons Castor and Pollux." Pollux is the Latin version of Polydeuces. Castor was the son of Leda and her husband Tyndareus, the king of Sparta.
Painting (c.XV-XVI century). Borghese Gallery, Rome, Italy.
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Leda and the Constellation Cygnus

For the ancient Greeks, the constellation Cygnus, which means "swan", was related to the myth of Zeus and Leda, the queen of Sparta. The queen of sparta was so beautiful that Zeus was attracted to her. After numerous attempts to conquer Leda's love, Zeus changed himself into a wonderful white swan. The swan was magnificent and Leda fell in love with him. Leda then delivered a blue egg. When the egg was hatched, two lovely children came out of it: Polydeuces and the beautiful Helen who later became famous as Helen of Troy. The constellation Cygnus was then formed to celebrate the lovely swan.

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Windows to the Universe, a project of the National Earth Science Teachers Association, is sponsored in part is sponsored in part through grants from federal agencies (NASA and NOAA), and partnerships with affiliated organizations, including the American Geophysical Union, the Howard Hughes Medical Institute, the Earth System Information Partnership, the American Meteorological Society, the National Center for Science Education, and TERC. The American Geophysical Union and the American Geosciences Institute are Windows to the Universe Founding Partners. NESTA welcomes new Institutional Affiliates in support of our ongoing programs, as well as collaborations on new projects. Contact NESTA for more information. NASA ESIP NCSE HHMI AGU AGI AMS NOAA