A wheel weighted with swinging mallets. A cylinder rotating in a sealed, water-filled container. A siphon that transfers liquid back and forth in a seemingly endless loop. These may sound like the ...

Perhaps the most persistent nonsense in physics: the perpetual motion machine. Bad ideas come and go in physics. But there’s one bit of nonsense that is perhaps more persistent than all others: the ...

The water runs uphill, drops back down, spins a wheel, and runs right back up hill again. For perspective-bending artist M.C. Escher, that vision this carefully sketched lithograph. For YouTuber user ...

A wheel weighted with swinging mallets. A cylinder rotating in a sealed, water-filled container. A siphon that transfers liquid back in forth in a seemingly endless loop. These may sound like the ...