BrainStuff

A standard HD screen has roughly 2 million pixels per frame -- but an ultra HD has four times that resolution. Learn more about ultra hi-definition in this HowStuffWorks podcast. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

Shaping an airplane a certain way -- or using materials that absorb radar waves -- causes a stealth aircraft to have the signature of a small bird, rather than an airplane. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.