Bipedalism is not suitable for moving rapidly on the ground. Instead, this form of locomotion is very efficient when travelling at a slow speed of about 4 km per hour. If one walks slowly, bipedal locomotion consumes less energy than quadrupedal locomotion.
Bipedal walking is therefore suitable for traveling long distances, as when seeking for scattered food under the burning sun of the savannah, and for bringing the food back to the sleeping sites.
■References (Books, papers, Web articles, etc.)
The Origin of Modern Humans (Scientific American Library) Roger Lewin W H Freeman & Co (October 1, 1993)
『人類の起源と進化―人間理解のために』 江原昭善 （裳華房、1993）
Related iCards: Harsh environments evolved active food sharing as a means of communication (Vol 1.)
★If you interested in this text, please have the following ebook at hand. For that, Click on the URL below.
https://society-zero.com/icardbook/011/index.html
★This article is a piece of "knowledge card" that makes up iCardbook, "Evolution of Human Sociality(Juichi Yamagiwa, Shun Hongo)"
iCardbook, a card-type specialized book that organizes “Knowledge Cards” is a new form of book in the smartphone age.
■iCardbook Benefits:Good value for reading
・you can read it quickly in your pocket of time, e.g. commuting
・You can immediately understand the "drawing " in the author's head
・Amazon Prime members can read for free
◎About iCardbook(english)
https://society-zero.com/icard/icardbookenglish
◎About iCardbook(japanese)
https://society-zero.com/chienotane/archives/5067
■The References list of “Evolution of Human Sociality”
