Rainbows aren’t just arcs in the sky — they’re actually full circles by admin on August 10, 2017 Rainbows aren’t just arcs in the sky — they’re actually full circles Uncategorized all rainbows are actually full circles. They can only be seen by humans if we're in the air becausefrom Earth's surfaceRainbows are one of nature's most stunning displays. They form when light enters and bends out of raindrops in the air. The conditions have tthe ground interferes. Read more: http://www.businessinsider.com/sai FACEBOOK: https://www.facebook.com/techinsider TWITTER: https://twitter.