Para viajar entre sistemas estelares, uma nave espacial precisaria de uma tecnologia extremamente sofisticada — se não impossível
- Professor of Aerospace Engineering, Georgia Institute of Technology
To travel between solar systems, a spacecraft would need extremely sophisticated – if not impossible – technology.
Há muito tempo, as pessoas supõem que as rodas evoluíram de simples rolos de madeira. Mas como? E por quê? Um novo modelo focado na vantagem mecânica e na resistência estrutural sugere algumas respostas.
People have long assumed that wheels evolved from simple wooden rollers. But how? And why? A new model focused on mechanical advantage and structural strength suggests some answers.
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