{"page":"\u003clink rel=\"stylesheet\" href=\"https://lessonplanet.com/assets/packs/css/resources-572d6a42.css\" /\u003e\n\u003clink rel=\"stylesheet\" href=\"https://lessonplanet.com/assets/packs/css/lp_boclips_stylesheets-f4d0de30.css\" media=\"all\" /\u003e\n\u003cdiv data-title='Spend a Day With the World’s Only Grass-Eating Monkeys | National Geographic' data-url='/boclips/videos/5c5dccf689cabc00016ddc93' data-video-url='/boclips/videos/5c5dccf689cabc00016ddc93' id='bo_player_modal'\u003e\n\u003cdiv class='boclips-resource-page modal-dialog panel-container'\u003e\n\u003cdiv class='react-notifications-root'\u003e\u003c/div\u003e\n\u003cdiv class='rp-header'\u003e\n\u003cdiv class='rp-type'\u003e\n\u003ci aria-hidden='true' class='fai fa-regular fa-circle-play'\u003e\u003c/i\u003e\nVideo\n\u003c/div\u003e\n\u003ch1 class='rp-title' id='video-title'\u003e\nSpend a Day With the World’s Only Grass-Eating Monkeys | National Geographic\n\u003c/h1\u003e\n\u003cdiv class='rp-actions'\u003e\n\u003cdiv class='mr-1'\u003e\n\u003ca class=\"btn btn-success\" data-posthog-event=\"Signup: LP Signup Activity\" data-posthog-location=\"body_link_boclips\" data-remote=\"true\" href=\"/subscription/new\"\u003e\u003cspan\u003e\u003cspan\u003eGet Free Access\u003c/span\u003e\u003cspan class=\"\"\u003e for 10 Days\u003c/span\u003e\u003cspan\u003e!\u003c/span\u003e\u003c/span\u003e\u003c/a\u003e\n\u003c/div\u003e\n\u003c/div\u003e\n\u003c/div\u003e\n\u003cdiv class='rp-body'\u003e\n\u003cdiv class='rp-info'\u003e\n\u003cdiv aria-label='Hide resource details' class='rp-hide-info' role='button' tabindex='0'\u003e\u0026times;\u003c/div\u003e\n\u003ci aria-label='Expand resource details' class='rp-expand-info fai fa-solid fa-up-right-and-down-left-from-center' role='button' tabindex='0'\u003e\u003c/i\u003e\n\u003ci aria-label='Compress resource details' class='rp-compress-info fai fa-solid fa-down-left-and-up-right-to-center' role='button' tabindex='0'\u003e\u003c/i\u003e\n\u003cdiv class='rp-rating'\u003e\n\u003cspan class='resource-pool'\u003e\n\u003cspan class='pool-label'\u003ePublisher:\u003c/span\u003e\n\u003cspan class='pool-name'\u003e\n\u003cspan class='text'\u003e\u003ca data-publisher-id=\"418346\" href=\"/search?publisher_ids%5B%5D=418346\"\u003eNational Geographic\u003c/a\u003e\u003c/span\u003e\n\u003c/span\u003e\n\u003c/span\u003e\n\u003c/div\u003e\n\u003cdiv class='rp-description'\u003e\n\u003cspan class='short-description'\u003eSpend a day with geladas monkeys, one of the flagship species of Africa’s alpine grasslands that are found only in the Ethiopian Highlands. ➡ Subscribe About National Geographic: National Geographic is the world's premium destination for...\u003c/span\u003e\n\u003cspan class='full-description hide'\u003eSpend a day with geladas monkeys, one of the flagship species of Africa’s alpine grasslands that are found only in the Ethiopian Highlands. ➡ \u003ca href='http://bit.ly/NatGeoSubscribe' target='_blank' rel='nofollow'\u003eSubscribe\u003c/a\u003e About National Geographic: National Geographic is the world's premium destination for science, exploration, and adventure. Through their world-class scientists, photographers, journalists, and filmmakers, Nat Geo gets you closer to the stories that matter and past the edge of what's possible. Get More National Geographic: Official \u003ca href='http://bit.ly/NatGeoOfficialSite' target='_blank' rel='nofollow'\u003eSite\u003c/a\u003e \u003ca href='http://bit.ly/FBNatGeo' target='_blank' rel='nofollow'\u003eFacebook\u003c/a\u003e \u003ca href='http://bit.ly/NatGeoTwitter' target='_blank' rel='nofollow'\u003eTwitter\u003c/a\u003e \u003ca href='http://bit.ly/NatGeoInsta' target='_blank' rel='nofollow'\u003eInstagram\u003c/a\u003e Geladas, one of the flagship species of Africa’s alpine grasslands, are found only in the Ethiopian Highlands. They are the smallest vestige of a genus that millions of years ago stretched from South Africa to Spain and into India. Once among the most prominent primates—one species was the size of a gorilla—they were likely driven to extinction by climate changes, competition with more adaptable baboons, and our ancestors, who butchered them. Today all that remains of Theropithecus are geladas, which offer valuable, if imperfect, insight into the world inhabited by our predecessors. There is no other animal like them. Geladas’ most recognizable features are crimson patches of hairless skin on their chests. In females, this region changes color, and tiny sacs around its edge fill with fluid, often indicating that they are ready to mate. The pink on dominant males darkens to red. Other primates signal sexual readiness with their rumps, but these monkeys spend most of the day scooting on their rears, gorging. Most primates climb trees to eat fruit and leaves. Geladas use opposable thumbs to pluck grass blades and herbs. Like zebras, they mince food with their molars. Guassa researchers, from Ethiopia and abroad, have followed the minutiae of the daily life of almost 500 individuals. They monitor activity, study relationships, track births, and document deaths. Yet much about geladas remains unknown. After a revolt in Ethiopia ousted Emperor Haile Selassie in 1974, a civil war made fieldwork difficult. In the early 1990s uprisings drove out the ruling communist junta, the Derg, and scientists returned. Today it’s still not clear how many geladas are left. Read the entire article from the April 2017 issue of National Geographic \u003ca href='http://www.nationalgeographic.com/magazine/2017/04/gelada-monkeys-grass-eating-guassa-ethiopia-bleeding-heart/' target='_blank' rel='nofollow'\u003eMagazine.\u003c/a\u003e Spend a Day With the World’s Only Grass-Eating Monkeys | National \u003ca href='https://youtu.be/hFHcXxaqMhg' target='_blank' rel='nofollow'\u003eGeographic\u003c/a\u003e National \u003ca href='https://www.youtube.com/natgeo' target='_blank' rel='nofollow'\u003eGeographic\u003c/a\u003e\u003c/span\u003e\n\u003c/div\u003e\n\u003cdiv class='action-container flex justify-between'\u003e\n\u003cbutton aria-expanded='false' aria-label='Read more description' class='rp-full-description' type='button'\u003e\n\u003ci class='fai fa-solid fa-align-left'\u003e\u003c/i\u003e\n\u003cspan id='read_more'\u003eRead More\u003c/span\u003e\n\u003c/button\u003e\n\u003cdiv class='rp-report'\u003e\n\u003c/div\u003e\n\u003c/div\u003e\n\u003cdiv 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