Zucca, a Labrador retriever therapy dog, accompanies a child during a session with a dentist in a public hospital as part of a program to calm the fears of children in the dentist's chair, in Santiago, Chile, on May 8, 2018. #

A Legoland employee poses with a Lego model of U.S. actress Meghan Markle in place next to her husband-to-be, Britain's Prince Harry, outside a Lego-brick model of Windsor Castle at Legoland in Windsor on May 8, 2018, during a photo call celebrating the upcoming royal wedding. Prince Harry and Meghan Markle will wed on May 19 at St. George's Chapel at Windsor Castle. #

The NASA InSight spacecraft launches onboard a United Launch Alliance Atlas-V rocket on May 5, 2018, from Vandenberg Air Force Base in California. NASA launched its latest Mars lander, called InSight, designed to perch on the surface and listen for "Marsquakes" ahead of eventual human missions to explore the Red Planet. #

Fireworks explode over the statue "Motherland Calls," a World War Two memorial located on the top of Mamayev Kurgan hill, during a light and laser show dedicated to the 73rd anniversary of the victory over Nazi Germany in World War Two, in Volgograd, Russia, on May 8, 2018. #

Actress Frances McDormand arrives at the Metropolitan Museum of Art Costume Institute Gala to celebrate the opening of “Heavenly Bodies: Fashion and the Catholic Imagination” in New York City on May 7, 2018. #

"Be Best" is the name of the initiative announced by U.S. first lady Melania Trump in the Rose Garden at the White House in Washington, D.C., on May 7, 2018. According to the announcement, the goal of "Be Best" is to teach children "the importance of social, emotional, and physical health," concentrating on "well-being, social media use, and opioid abuse." #

Artist Michael Pendry adds a white origami dove to his art installation "Les Colombes," which is being installed at Salisbury Cathedral on May 10, 2018, in Wiltshire, England. The art installation, which features a flock of around 2,500 white origami doves flying the length of the cathedral nave, opens to the public on May 12. Community groups in Salisbury have been encouraged to write their own messages and fold their own doves. The artwork's installation comes just over two months since the nerve agent attack in the city and while the clean-up continues the artist hopes the artwork carries a message of resilience, peace and hope. #

Araya A. Hargate attends the screening of "Everybody Knows (Todos Lo Saben)" during the 71st annual Cannes Film Festival at Palais des Festivals on May 8, 2018, in Cannes, France. #

Migrants, part of a group intercepted aboard a dinghy off the coast in the Mediterranean Sea, rest after arriving on a rescue boat in the port of Malaga, Spain, on May 8, 2018. #

Refugees and migrants wait to be rescued by members of the Spanish NGO Proactiva Open Arms, after leaving Libya, trying to reach European soil aboard an overcrowded rubber boat north of the Libyan coast on May 6, 2018. Refugees and migrants from Bangladesh, Egypt, Nigeria, Ghana, Pakistan, Sudan, Libya, Eritrea, and Senegal were rescued from the boat. #

Kilauea's summit crater glows red in Volcanoes National Park, Hawaii. on May 9, 2018. Geologists warned on Wednesday that Hawaii's Kilauea volcano could erupt explosively and send boulders, rocks, and ash into the air around its summit in the coming weeks. #

U.S. Army National Guard First Lieutenant Aaron Hew Len takes measurements for sulfur dioxide gas at volcanic fissures in the Leilani Estates neighborhood, in the aftermath of eruptions from the Kilauea volcano, on Hawaii's Big Island on May 8, 2018, in Pahoa, Hawaii. Leilani Estates residents have been allowed to return during the day to inspect property and remove belongings. Officials have confirmed 26 homes have now been destroyed by lava in the neighborhood. #

Engineered Arts prosthetic expert Mike Humphrey checks on "Fred," a recently-completed Mesmer robot that was built at the company's headquarters in Penryn, in Cornwall, England, on May 9, 2018. Founded in 2004, the Cornish company is a world leader in life-sized commercially-available humanoid robots for entertainment, information, education, and research. The company has successfully sold its fully interactive and multilingual RoboThespian robot to science centers, theme parks and visitor attractions, and to academic and commercial research groups where they are used as research and development platforms. More recently the company has been building a range of lifelike bio-mechanical Mesmer robots. Built on the sensors and software framework already developed for RoboThespian, the Mesmer robots offer extensive interaction but can also move very smoothly, quietly, and naturally. #

Grimes (right) and her boyfriend (Elon Musk, center) attend the "Heavenly Bodies: Fashion & The Catholic Imagination" Costume Institute Gala at The Metropolitan Museum of Art on May 7, 2018, in New York City. Fellow attendee Alexandra Parker ascends the stairs at left. #

Members of the intermediate seniors ballet class work through some moves at the Queensland Ballet dance studios on May 6, 2018, in Brisbane, Australia. Queensland Ballet has been running ballet classes for seniors every Sunday morning since 2015, with participants ranging from 60 to 85 years of age. A study by Queensland Ballet and the Queensland University of Technology released in April found that ballet helped older Australians feel happier, more energetic and healthier overall. The three-month project began in 2017 to critically investigate older adults' motivations to participate in ballet, and its health and well-being outcomes. It found found participants experienced higher energy levels, greater flexibility, improved posture, and an enhanced sense of achievement. They also felt happier and enjoyed a sense of community and friendship. #

A participant awaits the upcoming action at the International Medieval Combat Federation World Championships at Scone Palace on May 10, 2018 in Perth, Scotland. Thousands of visitors were expected to attend the crowning place of Scottish Kings, Scone Palace, for the IMCF World Championships which has five hundred competitors and officials from all over the world, from the UK to as far afield as Australia, South Africa, and Mexico. #

A retiring police dog spends a last moment with his handler before being handed over to his new caretakers in Quito, Ecuador, on May 9, 2018. The ceremony retired 61 police dogs who spent years sniffing out illegal drugs and who helped rescuers find victims. #

Members of a search team work at an excavation site where the remains of Red Army soldiers killed in World War Two were found, near the village of Didymkin in Stavropol region, Russia, on April 26, 2018. In a week of searching, the group formed by military, members of military-patriotic camps, and volunteers, found the remains of 12 soldiers. #