Stunning drone footage captures Chasm 1, a huge crack on the Brunt Ice Shelf. When it inevitably intersects with the nearby 万圣节前夕 Crack, an iceberg the size of Houston, Texas will break off into the ocean.
National Geographic partnered with the International Dark-Sky Association to provide families with a true ‘dark sky’ 天文台 experience, free from the artificial light prevalent in city and suburban communities.
Electromagnetism is one of the four fundamental forces of nature. Learn about the relationship between electricity and magnetism, the different wavelengths on the electromagnetic spectrum, and how an invisible force protects our entire planet.
