(Bilder: Bartłomiej Szewczyk/ www.istockphoto.com; Bob Thomas; contrastwerkstatt/ www.fotolia.com; Troels Graugaard/ www.istockphoto.com; auremar/ www.fotolia.com; Carmen Martínez Banús/ www.istockphoto.com; NatUlrich/ www.fotolia.com und contrastwerkstatt/ www.fotolia.com; dpa; contrastwerkstatt/ fotolia.com; kali9/ www.istockphoto.com; Joshua Hodge Photography/www.istockphoto.com und spuno/ www.fotolia.com)