Artur Widak/NurPhoto via Getty Images
Harald Tittel/picture alliance via Getty Images
Ria Litzenberg, University of Tübingen
Bebeto Matthews/AP Photo
Anna Moneymaker/Getty Images
US Air Force photo by Tech. Sgt. John Raven
Jeffrey Greenberg/Education Images/Universal Images Group via Getty Images; Karwai Tang/WireImage via Getty Images
Courtesy of Dariusz Poliński
Getty Images
Viktor Fridshon/Global Images Ukraine via Getty Images