An alligator is pictured stuck in the mud of the dry Pilcomayo river, which is facing its worst drought in almost two decades, on the border between Paraguay and Argentina, in Boqueron, July 3, 2016. (Photo by Jorge Adorno/Reuters)

Two and a half year-old Jennifer Martin in tears during a visit to Santa at Harrods department store in London, 10th December 1949. (Photo by William Vanderson/Fox Photos/Hulton Archive/Getty Images)

Patsy Gibbons takes his two rescue foxes, Grainne and Minnie (unseen), for a walk in Kilkenny, Ireland April 25, 2016. Gibbons nursed the foxes back to health after they were found abandoned as injured cubs, and they have stayed with him since. (Photo by Clodagh Kilcoyne/Reuters)

A two-horse team street cleaner, with sprayer, squeegee, and roller at rear. New York, between ca. 1910 and ca. 1915. (Photo by NYC Municipal Archives)

It's not often that two ferocious tigers have to beat a hasty retreat from a confrontation. But it seems that the wrath of a mother bear protecting two cubs on her back was more than enough to scare this pair off. Wildlife photographer Aditya Singh captured the encounter during a visit to Ranthambore Tiger Reserve in Rajasthan, India.

Two male African mantis Pseudempusa pinnapavonis (Peacock Mantis) show their colours in Igor's home studio in Munich, Germany. (Photo by Igor Siwanowicz/Barcroft Media)

Members of the Raskol gang “Dirty Dons 585”, 9 Mile Settlement, Port Moresby. All of these young men committed a set of rapes and armed robberies. The gang members admit that two thirds of their victims are women. (Photo by Vlad Sokhin)