This huge male orangutan is having a right old laugh as he squints his eyes and shows his huge teeth. The orangutan, called Bimbo, was relaxing on a platform around 5m high in his enclosure when he broke out into a laugh. But his happy smile soon disappeared when another orangutan came over to see what was going on. Bimbo – the only male in the group of five apes at Leipzig Zoo, in Germany - appears to be laughing in much the same way as a human would. (Photo by Martina Radtke/Solent News)

A Russian Sukhoi Su-25 fighter jet takes off during the withdrawal of Russian troops from Syria at Hmeymim airbase, Syria, March 16, 2016. (Photo by Vadim Grishankin/Reuters/Russian Ministry of Defence)

The Villarica volcano erupts near Pucon, Chile, early Tuesday, March 3, 2015. The Villarica volcano erupted Tuesday around 3 a.m. local time (06:00 GMT), according to the National Emergency Office, which issued a red alert and ordered evacuations. (Photo by Aton Chile/AP Photo)

People commute during a heavy rain shower in Chandigarh, India, June 22, 2016. (Photo by Ajay Verma/Reuters)

“The scientists behind NASA's $2.5 billion Curiosity rover mission on Mars on Tuesday explained the nature of a tiny, gleaming "flower" embedded in Red Planet rock, and revealed where they'll be using the SUV-sized robot's drill for the first time”. – Alan Boyle via NBCNews.com

Photo: Scientists say that a “Martian flower”, seen here in an image from the Curiosity rover's Mars Hand Lens Imager, is a 2-millimeter-wide grain or pebble that's embedded in the surrounding rock. Another, darker-colored mineral grain can be seen above and to the left. (Photo by NASA)

The Euro sculpture is partially reflected in a puddle on a cobblestone pavement in front of the headquarters of the European Central Bank in Frankfurt on Jan. 21. (Kai Pfaffenbach/Reuters)

Wayne Painter, 70, saw the sun set beneath lenticular clouds 20km wide in Tasmania, Australia in November 2021. Some likened the image to a near-miss with Mars. (Photo by Wayne Painter/Kennedy News)

People of the LGBTQI community pose for a photo on a large rainbow colored flag as they take part in the parade to mark Thailand Pride Festival 2022 in Bangkok, Thailand, 27 November 2022. Thailand's LGBTQI groups and foreigners attended the Pride festival to raise awareness and promote sexual diversity and equal rights for the Lesbian, Gay, Bisexual, Transgender and Queer (LGBTQ) community. The festival also aims to promote tourism in Thailand as Covid-19 restrictions are being lifted, with hopes to becomes an annual and sustainable event in November. (Photo by Narong Sangnak/EPA/EFE/Rex Features/Shutterstock)