astronomy One Nineteenth Century observation which convinced many.pdf

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The document discusses observations of Mars in the 19th century that provided evidence for life on the planet. Specifically, it notes that Mars has polar ice caps that grow in winter and recede in summer, and dark areas in the northern hemisphere that radiate radio and x-ray waves and are connected to the polar caps by a network of canals. These seasonal changes in the polar ice caps and dark areas were seen as indications of life on Mars.

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astronomy One Nineteenth Century observation which convinced many of the existence of at
least plant life on Man was the behavior of the polar caps and dark areas. What was this
behavior? An attempted invasion during the 1930's which was broadcast on the radio. The
northern polar cap grows during the northern winter while the dork areas in the northern
hemisphere begin to radiate x-ray and radio waves. The polar caps are connected to the dark
areas by a network of canal v The dark areas in the northern hemisphere grow during the
northern summer as the northern polar cap recedes.
Solution
D) is the answeer.
The planet Mars has two permanent polar ice caps. During a pole's winter, it lies in continuous
darkness, chilling the surface
https://en.wikipedia.org/wiki/Martian_polar_ice_caps

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