From high above the US, you might notice strange barcode-like markings on the ground. These symbols were once used to calibrate aerial and satellite cameras back in the 20th century, painted onto concrete or asphalt in black or white. Acting like eye charts for cameras, they helped fine-tune imaging equipment and determine optical resolution limits. And they aren't the only cool and weird things you'll find in the US. Let's talk about more mysterious things with an explanation. #brightside Animation is created by Bright Side. —————————————————————————————- Music from TheSoul Sound: https://thesoul-sound.com/ Listen to Bright Side on: Spotify – https://open.spotify.com/show/0hUkPxD34jRLrMrJux4VxV Apple Podcast – https://podcasts.apple.com/podcast/idhttps-podcasts-apple-com-podcast-bright-side/id1554898078 —————————————————————————————- Our Social Media: Facebook – https://www.facebook.com/brightside/ Instagram – https://www.instagram.com/brightside.official/ Tik Tok – https://www.tiktok.com/@brightside.official?lang=en Snapchat – https://www.snapchat.com/p/c6a1e38a-bff1-4a40-9731-2c8234ccb19f/1866144599336960 Stock materials (photos, footages and other): https://www.depositphotos.com https://www.shutterstock.com https://www.eastnews.ru —————————————————————————————- For more videos and articles visit: http://www.brightside.me

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