Analysis: $131 Trillion To Reduce Global Warming

Money is a sticking point in climate-change negotiations around the world. As economists warn that limiting global warming to 1.5 degrees Celsius will cost many more trillions than anticipated, WSJ looks at how the funds could be spent, and who would pay. Illustration: Preston Jessee/WSJ

Village Walks: Pitigliano In Tuscany, Italy (4K)

Carved from volcanic stone, the town of Pitigliano is ocated south of Montepulciano, and not too far from the thermal mineral waters of Bagno San Filippo. 

The cliffs of Pitigliano, Sovana and Sorano protected the remains of the many peoples who called the Fiora Valley, and its protective peaks, their homes since 2300 BC.

Walking Tour: Amsterdam – The Netherlands (4K)

Amsterdam is the Netherlands’ capital, known for its artistic heritage, elaborate canal system and narrow houses with gabled facades, legacies of the city’s 17th-century Golden Age. Its Museum District houses the Van Gogh Museum, works by Rembrandt and Vermeer at the Rijksmuseum, and modern art at the Stedelijk. Cycling is key to the city’s character, and there are numerous bike paths. 

Science: Sleeping Without A Brain, Insect Invasions, Racist Search Algorithms

Simple animals like jellyfish and hydra, even roundworms, sleep. Without brains. Why do they sleep? How can we tell a jellyfish is sleeping? 

Staff Writer Liz Pennisi joins host Sarah Crespi to talk about what can be learned about sleep from these simple sleepers. The feature is part of a special issue on sleep this week in Science.

Next is a look at centuries of alien invasions—or rather, invasive insects moving from place to place as humans trade across continents. Sarah talks with Matthew MacLachlan, a research economist at the U.S. Department of Agriculture’s Economic Research Service, about his Science Advances paper on why insect invasions don’t always increase when trade does.

Finally, a book on racism and the search algorithms. Books host Angela Saini for our series of interviews on race and science talks with Safiya Umoja Noble, a professor in the African American Studies and Information Studies departments at the University of California, Los Angeles, about her book: Algorithms of Oppression: How Search Engines Reinforce Racism.

Travel: Top 10 Places To Visit In Bavaria, Germany

Bavaria, officially the Free State of Bavaria, is a federal state in the south-east of Germany. With an area of 70,550.19 square kilometres, Bavaria is the largest German state by land area, comprising roughly a fifth of the total land area of Germany.

Wildlife: Why Many Baby Elephants Die In First Year

Life as a baby African elephant is precarious – around one third die in their first year. From raging rivers to dangerous droughts, the risks are many.

But sometimes the threat comes from inside the herd, where a strict hierarchy can mean the difference between life and death. In unique footage from Africa, we explore a new side to elephants’ complex society. We have more videos about incredible elephants, and a new topic every Friday! Subscribe and sign up for notifications so you never miss out.

Views: The Gornergrat In Zermatt, Switzerland (8K)

The Gornergrat (3,089 m) is one of those places that everyone should visit at least once in a lifetime. The mountain panorama and the glorious view of the Matterhorn are unforgettable. With its sunny observation platform accessible all year, the Gornergrat, at an altitude of 3,089 m, has been one of Switzerland’s top excursion destinations since 1898. The Gornergrat Bahn was the world’s first fully electrified cog railway. Today it is a modern, eco-friendly railway, equipped with a regenerative braking system that generates electricity on the descent and so saves energy. Thus the energy for one to two new mountain drives is won by three downhill drives. Cog railway to the sky Europe’s highest open-air cog railway brings passengers direct from Zermatt station (1,620 m) to the summit of the Gornergrat, 365 days a year. The ride takes 33 minutes and requires a vertical climb of 1,469 m. The line leads on 9.4 kilometres over dramatic bridges, through galleries and tunnels, across forests of larch and Swiss stone pine, and past rocky ravines and mountain lakes. Panorama for the photo album The panorama is among the finest in the world. The views take in the Monte Rosa massif with Switzerland’s highest peak (Dufourspitze, 4,634 m); the second-largest glacier in the Alps, the Gorner Glacier; and a total of 29 mountains above 4,000 m, including, of course, the Matterhorn in all its glory. Europe’s highest hotel At the summit station on the Gornergrat, visitors find Europe’s highest-altitude hotel: the 3100 Kulmhotel Gornergrat. Facilities include a restaurant, astronomical observatory and attractive shops. Spending the night here is a wonderful experience.