Tangled telephone cords and electronic cables that come to resemble bird nests can frazzle even the most stoic person. Now researchers have unraveled the mystery behind how such knots form.

• 电话线和电线如同”鸟窝“一般被纠缠在一起会让天底下最一本正经的人都感到焦头烂额。如今，研究者们已经发现了绳子如何会打结背后的秘密。