Photos of the Day: The ATSX Ice Cross Downhill World Championship

Cincinnati, US

Fiona, a baby Nile hippopotamus, has her gums rubbed by a zookeeper in her enclosure at the city zoo and botanical garden
Photograph: John Minchillo/AP

Ras al-Khaimah, United Arab Emirates

Robotic jockeys control camels during a race at Al Sawan race track
Photograph: Francois Nel/Getty Images

Iceland, Aurora Borealis

Northern lights, shine over the plane wreck of a US navy airplane – a Douglas Super DC-3 – on Black Beach in Sólheimasandur
Photograph: Owen Humphreys/PA