These adorable cats – which are twins – showcase their contrasting blue and green eyes. The cats have a condition called heterochromia iridis, which causes each eye to vary in color. (Photo by @sis.twins/Caters News Agency)

Grace Sun, from Shenzhen China, poses for a picture outside Capital One Arena, ahead of a rally for U.S. President-elect Donald Trump the day before he is scheduled to be inaugurated for a second term, in Washington, U.S., January 19, 2025. “I think it's a very good thing between China and America”, said Sun. “I think cooperation will be better”. (Photo by Marko Djurica/Reuters)

A competitor scrambles in the mud under barbed wire during the Tough Guy Challenge 2009 at South Perton Farm on February 1, 2009 in Wolverhampton, England. The biannual event to raise cash for charity challenges thousands of international competitors to run through a gruelling set of 21 obstacles including water, fire and tunnels after a lengthy run at the start. (Photo by Christopher Furlong/Getty Images)

“Self-educated photographer, Quebec. I always impassioned myself for the animal world and natural spaces, in particular for the red squirrels and the titmouses. Having reached sixty and more, I am nothing any more has to prove but all has to show”. – Andre Villeneuve. Photo: “Eat and run”. (Photo by Andre Villeneuve)

After some days with temperatures below freezing point, I was out skating at some lakes at the outskirts of Oslo in Norway. After a while I noticed something on the ice. To my astonishment it was a dead frozen frog.