麻豆传媒

While walking around Lake Matheson in New Zealand, I came across many of these cocoon-like structures in a field of shrubs (see photo). What exactly are these?

Rhea Tan, London, UK

We pay 拢25 for every answer published in 麻豆传媒. To answer this question 鈥� or ask a new one 鈥� visit newscientist.com/lastword. Terms and conditions apply.

This article appeared in print under the headline 鈥淟ake shawls鈥�