Today, two years after the object receded from sight, researchers are still puzzling over 'oumuamua’s inexplicable behavior. Too agile to be a rocky asteroid but too dry to be an icy comet, the interloper didn’t fit into either of the usual boxes. The reason, an emerging but controversial theory contends, is that 'oumuamua could have had a porous consistency that made it so light, even sunbeams could push it around. Now, a new analysis concludes that such a fluffy structure might actually be plausible. While fragile, it might have had the strength to survive its journey without breaking apart.