20. 15. Ritual from where. What small addition was incorporated in 2007? (3)
21. 16. What record comprises Vietnam, Tajikistan, Russia, Pakistan, North Korea, Nepal, Myanmar, Mongolia, Laos, Kyrgyzstan, Kazakhstan, India, Bhutan and Afghanistan? Shared with whom?(2)
22. 17. The set W came up with X inspired by, according to differing accounts, the behaviour of drying shirts and scraps of paper. Tested using three non-humans. The set Y came up with Z (aided by their capacity to combine silk and rubber) a few weeks later. Z was perhaps more easy to use and won adopters in several countries. ID W,X, Y and Z. (4)
23. 18. Behead one attributed to the master and all you will have is/are a foot/feet? Behead another rediscovered in 1904 and the remainder is science. Behead a third to hold a thread Put the heads together to arrive at a calendar guy’s contribution. Explain why there are only three. (5)