Two legs, eyes, and ears: https://www.quora.com/Why-do-all-organisms-have-two-eyes-two-ears-one-mouth-and-one-nose , http://animals.howstuffworks.com/mammals/bipedalism1.htm
Yawns: http://news.discovery.com/human/health/yawning-social-behavior.htm
Mirror: http://www.sciencefocus.com/qa/what-colour-mirror
Earth on foot: http://matadornetwork.com/bnt/seriously-slow-6-travelers-who-walked-around-the-world/
Life shaped Earth: https://answers.yahoo.com/question/index?qid=20121118075546AAPKuDl
No bugs: http://teacher.scholastic.com/activities/explorations/bug/libraryarticle.asp?ItemID=127&SubjectID=119&categoryID=4
Die in a day: http://www.ecology.com/birth-death-rates/
No language: http://neuroanthropology.net/2010/07/21/life-without-language/
http://blog.dictionary.com/origin/
Religions: https://www.psychologytoday.com/blog/excellent-beauty/201504/why-are-there-so-many-religions
No humans: https://www.reddit.com/r/AskReddit/comments/1xcl6n/would_the_earth_be_better_off_without_humans/