Ancient roots, new energy! ✨ From a nearly 4,000-year-old ginkgo tree at Fulai Mountain to solar technology and new-energy vehicles, members of an Arab media delegation explored the natural heritage and green innovations in ancient Juxian county in Rizhao, Shandong, on Oct 28.

Ancient sea-level changes provide new evidence that during the Jurassic and Cretaceous, Earth underwent episodes of rapid “true polar wander,” which occurs when the solid outer Earth shifts relative to its spin axis. Learn more in Science:

Ancient Puebla’s secret tunnels. The Puebla tunnels are a system of tunnels under the Mexican city of Puebla. Long considered to be an just a legend, They were rediscovered in 2015. The underground tunnel system is beliveved to date back to 1531. It had been covered for decades, and the archeologist who unearthed the tunnel discovered antiques in the mud. Today it operates as a museum that doubles as a citywide thoroughfare.