The undated photo provided by Zoologische Gaerten Berlin on Wednesday, April 18, 2018 shows giraffe Max with a research device strapped to his head. The Berlin zoo said Wednesday that handlers trained giraffe Max for 10 months until they got him used to wearing the transmitter on his head, which makes him look a bit like a jogger wearing a headlamp for an evening run. (Photo by Zoologische Gärten Berlin via AP Photo)
