If it seems like more and more asteroids are nearly missing our planet, it's not that there are more of them passing by, it's just we didn't know they were there.
Here, Scott Manley shows the rate of discovery of asteroids in our solar system. As the number of objects increases, anxiety grows. The discoveries come slowly at first, but as technology improves with computer imaging and telescopes, the rate multiplies. It's a fascinating example of how perception and reality are very different. These objects aren't coming into being; they were already there and we simply hadn't seen them. via YouTube