A murmuration of starlings near Gretna Green, Scotland. | (REUTERS/Phil Noble)

A zookeeper carries a pelican in Dvur Kralove nad Labem, Czech Republic. | (REUTERS/David W Cerny)

Tifo at a soccer match in St. Petersburg, Russia. | (AP Photo/Dmitri Lovetsky)

A man plays 'topai,' a game that consists of picking up a cap with the mouth while balancing on a toe, in Islamabad, Pakistan. | (REUTERS/Akhtar Soomro)

A person celebrates Diwali in London. | (Shutterstock)

A woman walks past an anti-United States mural in Tehran. | (AP Photo/Vahid Salemi)

A woman walks in London. | (REUTERS/Yara Nardi)

The Palace of Westminster and a man are reflected in a puddle in London. | (REUTERS/Yara Nardi)

The Baltimore Ravens' Jordan Richards waits to be introduced before an NFL game in Baltimore. | (AP Photo/Nick Wass)

A Hindu devotee performs rituals in a polluted river in New Delhi. | (AP Photo/Altaf Qadri)

A racecar driver rides a scooter before practice in Austin, Texas. | (AP Photo/Chuck Burton)

People wearing historical costumes ride penny farthings in Prague. | (REUTERS/David W Cerny)

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