#hari

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Photo by @shonephoto (Robbie Shone) Underground inside G4 ice cave, in Switzerland. Mountain regions respond sensitively to climate change. Taking advantage of Alpine caves, a team of scientists led by Swiss Paleoclimatologist Dr. Marc Luetscher from the Swiss Institute for Speleology and Karst Studies (SISKA), is working to understand how permafrost has evolved through time. Ice caves form through a combination of snow intrusion and/or congelation of water infiltrating a karst system. Often up to several centuries old, the climate record of this ice remains largely under-studied. Today we are also able to tell if a cave was an ice cave in the past. This is achieved by looking for cryogenic cave calcites. These form when water enters a cave, and freezes and turns to ice. In this process, the water becomes progressively enriched in ions to the point that it becomes super-saturated and precipitates calcite. @natgeocreative


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Super Tree Groove - Singapore ✨💜💜💜✨ Amazing shot by ✨✨@jackmartinphotoart✨✨
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#wonderful_places for a feature 💜

Singapore
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📷: @krystlejwright // The island of Mo’orea in French Polynesia is incredibly picturesque especially as you climb up to view points such as the Belvedere Lookout. When you’re on island time, what better way to see the island then to cycle around it.


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Aerial Terrace | Photograph by Evgeny Vasenev (@vasenevphotography)
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Rice terraces form intricate patterns in Bali, Indonesia. Using terraces to farm in hilly or uneven areas of land prevent soil erosion and help with irrigation.

Today we are featuring @natgeoyourshot photographs selected for @natgeo “Photo of the Day.” To see more, go to natgeo.com/pod. #YourShotPhotographer


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Les preguntamos a los #NGXplorers qué recomendación le darían a alguien que quiere ayudar al planeta. ¡Mira el video para conocer sus consejos! 💬 #NatGeoFestCDMX


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Photo by @cristinamittermeier: A group of Malagasy fishermen gathers near the village of Ambodihavibe, Madagascar to unload a fishing boat. #fishing #madagascar

Madagascar
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Photo by @shp92shp
South Korean speed skater Seunghi Park (@shp92shp) has now competed in the Winter Olympics in not just one sport, but two. This year, the former short track skater — who won two gold medals in the 2014 Winter Olympics — is trying her hand at speed skating, competing in distances up to 1,000 meters. “Changing my sport took a lot of effort because the two are very different,” says Seunghi. “But I love the thrill that comes along with the speed.” Seunghi was born in Seoul and lives and trains in Hwaseong-si, a city in northwest South Korea. “The fact that the Olympics are taking place in my home country makes me feel more responsible and proud,” she says. Watch our story to see Seunghi training on the ice.

The Winter Olympics (@olympics) are taking place in Pyeongchang, South Korea, February 9-25. Tune in as we spotlight competing athletes from around the world. #Pyeongchang2018


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“Small pup in a big world” writes @drewbertcorgi
#dogsofinstagram


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Heaven is a place on earth 🏂 // Epic few days at @skiheavenly this week (scroll through for some out of this world mountaintop lake views + a rare birthday selfie 😇🤳🏻) #tahoesouth #skiheavenly

South Lake Tahoe, California
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