NASA says it could be another 20 years before humans touch down on Mars, but in a sense, the Mars Society has been exploring the red planet for more than a decade – in Utah. Photo: Csilla Orgel, a geologist of Crew 125 EuroMoonMars B mission, makes her way back to the Mars Desert Research Station (MDRS) in the Utah desert March 3, 2013. The MDRS aims to investigate the feasibility of a human exploration of Mars and uses the Utah desert's Mars-like terrain to simulate working conditions on the red planet. Scientists, students and enthusiasts work together developing field tactics and studying the terrain. All outdoor exploration is done wearing simulated spacesuits and carrying air supply packs and crews live together in a small communication base with limited amounts of electricity, food, oxygen and water. Everything needed to survive must be produced, fixed and replaced on site. (Photo by Jim Urquhart/Reuters)

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 serene turquoise glow glimmers from underneath these powerful icebergs. Stood in the middle of Antarctica, the giant icebergs appear to be from an unearthly world. These stunning photographs were captured by American photographer Michael Leggero. “My images show pure nature, as that is how I describe Antarctica, simply pure nature”, says the 43 year old, of Carthage, New York. “It is the only place on our planet that humans have not left a presence behind”. (Photo by Michael Leggero/Hotspotmedia/Visual Press Agency)

Human canvases modelling world famous artworks including Van Gogh's Sunflowers and Edvard Munch's The Scream take to the streets of London in a bid to mend Britain's disconnect with art on September 25, 2017. Award winning body paint artist Sarah Attwell was commissioned by online art platform Rise Art to show that great art is for everybody, following research that revealed 1 in 6 Brits have never set foot in an art gallery. (Photo by Imagewise Ltd/Rex Features/Shutterstock)

An Indian farmer from Tamil Nadu state wearing a necklace of human skulls representing suicides by agricultural workers takes part in a protest with other farmers in New Delhi on March 15, 2017. Tamil Nadu state farmers protested to demand a profitable price for their agricultral products, and called for the formation of management committee for solving Cauvery river water disputes. More than 200 farmers have committed suicide in Tamil Nadu in recent months following crop failure due to poor rainfall and inadequate water for irrigation. (Photo by Prakash Singh/AFP Photo)

Indian forest officials and police personnel try to chase away a wild male elephant at Hengrabari area in Guwahati on April 30, 2019. The elephant came down from Amchang Wildlife Sanctuary in search of food and later forest official tranquillized it, local media reported. As the pressure of population pushes human habitation closer to forests incidents of wild animals straying into cities is increasingly reported. (Photo by Biju Boro/AFP Photo)

Visitors look at a plastinated human body during the “Body Worlds” exhibition by German anatomist Gunther von Hagens at a pavilion of the Exhibition of Achievements of National Economy (VDNKh) in Moscow, Russia on March 24, 2021. Head of Russian Investigative Committee Alexander Bastrykin ordered a probe of the exhibition after it sparked outrage among conservative religious groups and public figure. (Photo by Evgenia Novozhenina/Reuters)

Brazilian tattoo artist Michel Praddo, also known as Diabao or Human Satan, and his wife Carol Praddo, known as Mulher Demonia or Demon Woman, take a picture with a fan at the beach shore in Praia Grande, Brazil on August 18, 2021. (Photo by Carla Carniel/Reuters)