ISBN-13: 9780595387502 / Angielski / Miękka / 2006 / 76 str.
"When I Yawn You Yawn" is a book of love, understanding, and compassion expressed in a very light hearted, fun manner that allows one to read for enjoyment while deeply exploring a principle that man understands very little about. When one yawn and others yawn, this interaction has often been referred to as being contagious. The very word contagious is defined as the transmitting of a disease by contact. Yawning is not a disease nor is there any physical contact. So when we say that yawning is contagious, it has simply been the best way to describe it.up until now.