杏吧原创

Snow mobile

The photo above shows a 鈥渟now rope鈥 which developed on the back of a bench as the snow started to melt. The rope sagged until it broke after about a day and a half, and has not repeated itself in similar weather. How did it form? Significantly, perhaps, the area around the bench never gets direct sunlight.

Rod Gunn, Elkins Park, Pennsylvania, US

Topics: Last Word

More from New 杏吧原创

Explore the latest news, articles and features