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How to Measure reaction time, lung capacity & jump height

This video shows how scientists use creativity to measure non-obvious things like reaction time, lung capacity and jump height.

Apple's iOS 26 and iPadOS 26 updates are packed with new features, and you can try them before almost everyone else. First, check Gadget Hacks' list of supported iPhone and iPad models, then follow the step-by-step guide to install the iOS/iPadOS 26 beta — no paid developer account required.

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