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Video by Muhammed Muheisen @mmuheisen | Ramadan Kareem to all observing. I captured this video last week at Sami Alshamayleh Mosque in Amman, Jordan. On the evening of March 22 Muslims throughout the world will start the month of Ramadan, the holiest month in the Islamic calendar during which devotees fast from dawn until dusk. For more photos and videos from different parts of the world, follow me @mmuheisen and @mmuheisenpublic. #MuhammedMuheisen #Ramadan #الاردن #Jordan

Photos by @thomaspeschak | Presented by @Rolex | Usually when on assignment for National Geographic, I'm underwater. But not this time. Perched on a rocky ledge far above the Amazon rainforest canopy in Colombia’s Chiribiquete National Park, this is one of the few times I have climbed rather than dived to document an aquatic scene. However, the piranhas, jaguars, and paca I'm photographing are not flesh and blood—they are prehistoric paintings that could be 20,000 years old. Drawn onto an ancient rocky canvas, the images are among the oldest art in the Americas, the work of the first storytellers of the Amazon. My expedition to Chiribiquete and areas along the western edge of the Guiana Shield is part of Perpetual Planet Amazon, a project from National Geographic and Rolex. For two years I will journey between the Andes and the Atlantic, from 19,000-foot (5,800-meter) snow-capped volcanoes to coastal mangrove forests and beyond, documenting the Amazon. Unlike most storytellers who have ventured here before me, I will also dive below the surface to reveal a rarely glimpsed aquatic underworld. My collaborators are some of the Amazon’s most accomplished scientists: seven fellow National Geographic Explorers whose groundbreaking research is essential to securing the future of the Amazon’s freshwater ecosystem. | This expedition was supported by Rolex and its Perpetual Planet Initiative, which is partnering with the National Geographic Society on science-based expeditions to explore, study, and document change in the planet's most unique regions. #PerpetualPlanet Read the full story at the link in bio.

Photo by @irablockphoto | An orangutan hugs its mother at the Gladys Porter Zoo in Brownsville, Texas.

Presented by @Rolex | Read more at the link in bio. National Geographic Photographer and Explorer Tom Peschak documents Colombia’s Chiribiquete, home to some of the earliest depictions of humans' relationships with aquatic life in the Amazon. The pictographs include fauna and flora, people, and abstract geometric patterns. The National Geographic and Rolex Perpetual Planet Amazon Expedition is only the ninth expedition to be granted permission to explore Colombia’s Chiribiquete National Park. For two years, Tom will journey between the Andes and the Atlantic, from 19,000-foot snow-capped volcanos to mangrove forests and beyond, documenting the Amazon. | This expedition was supported by Rolex and its Perpetual Planet Initiative, which is partnering with the National Geographic Society on science-based expeditions to explore, study, and document change in the planet's most unique regions. #PerpetualPlanet Video by Otto Whitehead (@ottowhitehead) and Tom Peschak (@thomaspeschak) #WorldWaterDay

Video by @bertiegregory | Yellowfin tuna and spotted dolphin smash into what's known as a bait ball of mackerel off the coast of Costa Rica. Our goal during this shoot was to film dolphins feeding on the bait ball, but the big tuna was a welcome surprise. The local fishermen said seeing schools of tuna here was only a recent thing. Foreign commercial fishing vessels had virtually wiped them out on this coast until a change in the law several years ago pushed the fleets farther offshore. The tuna have since rebounded, which is great news for wildlife and for local fishers. Filmed for my show, "Epic Adventures With Bertie Gregory," now steaming on @disneyplus.

Photo by Orsolya Haarberg @fjellheimengalleri | Iceland in a nutshell: volcano, ice, sea stack, basalt rocks, and the northern lights. All these elements combine in a single image at Lóndrangar. Below the Snæfellsjökull ice cap (background), a 700,000-year-old volcano sleeps. It last erupted about 1,800 years ago. Follow @fjellheimengalleri for more images. #iceland #londrangar #snaefellsjokull #auroraborealis #northernlight

Photos by @babaktafreshi | Under a starry sky, our world can feel painless. But by day our sorrows are unveiled once again. Many know me as a photographer who reveals the night sky. I consider myself a global citizen, but I’m also proud of my heritage as an Iranian immigrant. There are four to five million of us, mostly in the U.S. (with 1.5 million), Canada, U.K., U.A.E., Germany, and Israel. We all left Iran for various reasons, but usually with common ground: seeking freedom. Many political sides exist within us, and I never imagined a unified voice of the Iranian diaspora—until the #WomanLifeFreedom uprising against the Islamic republic began in September. The unifyiing power of women brought us all together. Inside Iran, an estimated 20,000 peaceful protestors, most under 30 years old, have been arrested, many tortured in prison. These images capture a rally in New York, an example of Iranian immigrants echoing the protests in Iran. Powered by millennials and Gen Z (50% of Iran’s population), those protestors risk their lives not only for freedom but for a future—where the immense potential of this nation in culture, art, and science can flourish. #MahsaAmini #IranProtests

Read the full story at the link in bio. Genetics, the microbiome, and low screening rates may be factors in the increase, experts say. Here are risk factors for the disease—and the most common symptoms. Photograph by Science Photo Library

Video by @joelsartore | You’re looking at one of the most amazing and ingenious reproduction strategies in the entire animal kingdom. This female pocketbook mussel is using her own flesh to create a minnow-like lure to get a large stream fish to bite her, which then releases clouds of her microscopic babies into the water. Once launched, the larval young attempt to latch onto the fish’s gills and fins, then ride around awhile before falling off, dropping into the gravel of the streambed. Once settled, the larvae will begin to transform into juvenile mussels. Since adult mussels can’t travel, this elaborate process is how this kind of animal spreads its young upstream. Video taken @virginiawildlife. To see more species featured in the Photo Ark, follow me @joelsartore. #mussel #lure #pocketbook #video #wildlife #PhotoArk

Photo by @jasperdoest with Aaron Molloy | Arnold Camfferman, a 69-year-old skydiving instructor, is proof that it’s never too late to keep pursuing your dreams. Despite the widespread idea of slowing down as we age, Camfferman has completed more than 20,800 jumps and has no plans to stop anytime soon. As Harvard evolutionary biologist Daniel E. Lieberman explains, “Our genetic inheritance and history as humans require exercise and movement” to remain healthy into old age. Camfferman’s advice for a long and healthy life? “Never ever stop playing.” Read the full story at the link in bio and follow me @jasperdoest for more images about the science of longevity.