More advanced robotic pool cleaners, machines outfitted with treads, do a remarkably good job cleaning up fine debris and algae—much better than hose-type cleaners that need to be pulled out of ...

You think you know how to vacuum, right? You just move the machine back and forth a little bit, suck up the dirt, and call it a day? Wrong, actually. Just because you're going through the motions ...

but she was also practicing—standing on the hose, twisting her trunk in just the right way, and seemingly reveling in Mary’s spluttering surprise. The researchers, amused and surprised, noticed ...