Impossible motion: magnet-like slopes
Why the open web links it
Demonstrates a visual illusion where wooden balls appear to roll uphill due to cleverly designed slopes.
Linked by 45 independent sites, 4 of them widely read in the 2026-10 crawl of the open web, including impress.co.jp, ceskatelevize.cz, livedoor.blog, meiji.ac.jp, 3dprint.com.