- CC-By - S Watanabe (https://flic.kr/p/qm1y3x) Old Books - CC-By-SA - Tom Murphy VII (https://commons.wikimedia.org/wiki/File:Old_book_bindings.jpg) Searching - CC-By-SA - Edith Soto (https://flic.kr/p/c5xUxS) Factory Line - CC-By-SA - Roger W (https://flic.kr/p/5yzfJh) Clocksmith - CC-By - Jukka Kervinen (https://flic.kr/p/dGYeMu) Earth at Night - CC-By - Michael Coté (https://flic.kr/p/7179o) Earth from Space - CC-By-NC - NASA (https://flic.kr/p/m3e1dS) Two Pairs of Boots - CC-By-SA - Pavel Ševela (https://commons.wikimedia.org/wiki/ File:Two_pairs_of_rubber_boots.jpg) Geocaching - CC-By - Travis Wise (https://flic.kr/p/qBVnPi) Raw Steak - CC-By - Naotake Murayama (https://flic.kr/p/7KwG2z) Clockwork - CC-By - NatiousW (https://flic.kr/p/dNwf1N) OpenSource Penguin - CC-By-SA - Scott Ellis (https://flic.kr/p/8ZTGEi) Uncle Sam - Public Domain - US Gov. End Credits