文章列表

• 1.国家地理:送给外星人的地图(4)
• Our galactic neighborhood has no obvious street signs, and crafting a map pointing to one planet among the billions (and billions) of worlds populatin...
• 2.国家地理:送给外星人的地图(3)
• Carl asked Dad for help crafting the message while the two of them were in San Juan, Puerto Rico, for a meeting of the American Astronomical Society. ...
• 3.国家地理:送给外星人的地图(1)
• A half century ago astronomers designed a map that would point to Earth from anywhere in the galaxy. Then they sent it into space, reasoning that any ...
• 4.国家地理:送给外星人的地图(2)
• It was December 1971, and NASA was getting ready to launch Pioneer 10, a spacecraft that would sweep by Jupiter and make the first reconnaissance of t...
• 5.国家地理:不再冻人的五大湖(5)
• For Leavitt, 38, the ice has always been a place to bring her life into focus. 对38岁的拉维特来说，冰面一直是她关注的东西。 When her family would driv...
• 6.国家地理:不再冻人的五大湖(6)
• Leavitt isn't alone. Ice provides crucial things to everyone who goes out on it. Respite for some, dearly held recreation for others, food, and much m...
• 7.国家地理:不再冻人的五大湖(7)
• So, although one year may be warmer than the one before, some recent winters were icy cold. In 2013-14, the polar vortex carried frigid air from the A...
• 8.国家地理:不再冻人的五大湖(8)
• Winter is integral to the culture of the Great Lakes region. Warm mid-February days draw Michiganders outside, but they're uneasy. 冬天是五大湖地区文...
• 9.国家地理:不再冻人的五大湖(4)
• In Japan, priests at a Shinto temple have kept an almost 600-year record of when their lake freezes all the way across. Natural climate cycles emerge ...
• 10.国家地理:不再冻人的五大湖(3)
• The Great Lakes account for about 20 percent of the freshwater on Earth's surface. The lakes' geographical footprint is also hard to fathom. Their com...