Combining motion capture video with wind tunnel modeling, researchers show that a hawk shifts from unstable to stable flight while gliding through a gap. This points to new modes of flight control in birds with possible applications in uncrewed aerial systems.

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Автолюбителей предупредили о штрафе за неправильную тонировку14:52

17:08, 4 марта 2026Путешествия

Зима верне，更多细节参见电影

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you can match a string by repeatedly taking derivatives for each character. when you’ve consumed the entire input, you check if the resulting regex accepts the empty string (is “nullable”). if yes, the original string matched.

A study of