From Ditlev Petersen
The cartoon with the letter “Grounded chimps” in your end-of-year issue (24/31 December 2011, p 43) depicts apes sleeping on the ground, but I sincerely doubt that this progenitor of humans actually had a tail.
After all, neither Lucy, the 3-million-year-old hominid fossil, nor present day chimpanzees, have a tail.
Termestrup, Mørke, Denmark
