The Apophis asteroid appears in telescopes as nothing more than a moving speck of light. But the latest data tell us that this rock is bigger than the Rose Bowl and is hurtling towards Earth on what could be a collision course. Most unsettling, if it struck it would release the energy of 100 nuclear bombs. NOVA scienceNOW host Neil Tyson investigates this disturbing threat in our solar system.
Turkish subtitles will be added soon.
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