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immibis on How does a software code makes big machines move?
iqminiclip on Why do birds getting sucked into a jet engine cause such trouble? The engine can lift a jet, so how is it not powerful enough to chew up some bird bones with no problem?
jmlinden7 on Eli5: How come some popcorn kernels refuse to pop?
eZkkimo on Eli5: why do muscles and joints ache or get stiff with age?
GreatGrizzly on It’s been more than 40 years since the first successful space shuttle launch. However, as we saw with the recent NASA launch, we still have launch failures. Why is it so tough to achieve reliability in space shuttle launches? Does this apply to all space technology?