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This persnickety number determines the strength of magnetic fields. It figures in everything from motors and generators to ...
Plus: Masimo sues the US Customs and Border Protection over the Apple Watch's blood oxygen sensor, Insta360 has a new action camera, and BikeOn's power meter is tiny and affordable.
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Costa Rica
Find the latest Costa Rica news from WIRED. See related science and technology articles, photos, slideshows and videos.
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