One of my themes in this column over the years has been that you need to be skeptical of many of the claims out there about science and medicine. A healthy dose of skepticism can be a good thing, ...

But kirigami and parachutes don’t seem like they’d do well together. Conventional parachutes work by catching air, so slicing holes into them sounds like sabotage. But instead of altering a parachute ...

Some parachutes feature openings or holes, which aid in stability and control. Without a means for some air to escape through the top of the canopy, wind could force the parachute to rock ...