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What is a black hole? Hans Krimm, an observational astronomer at the National Science Foundation, answers this question. Part of the "Ask a Scientist" series.
Runtime: 1 minutes 15 seconds
Ask a Scientist: What Is the Difference Between Nanoscale and Atomic Scale?
Ask a Scientist: What Is the Nanoscale, and Do Nanomaterials Exist in History?
Ask a Scientist: Are There Naturally Occurring Nanomaterials?
Ask a Scientist: How Do You Manage the Risks Associated With Nanotechnology?
Ask a Scientist: How Do You Work With Nanoscale Materials Since They Are So Small?
Ask a Scientist: What Nanomaterials Would Be Useful for Medicine?
Ask a Scientist: Can Nanotechnology Be Used to Improve Current Household Products?
Ask a Scientist: What Are the Limitations of Nanobots?
Ask a Scientist: Are Planets Still Being Formed?
Ask a Scientist: What Is Coding?
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