Timpanogos Rock Glacier in Utah's mountains is buried under a layer of loose rock, and its ice is hidden inside it. Researchers mapped it using a gravimeter, which detects tiny differences in gravity caused by changes in underground density, since ice is less dense than rock. Taking 232 measurements over six trips, they used Bayesian inversion to compare thousands of simulated ice distributions with the data. The glacier holds about 1,550,000 cubic meters of ice, enough to fill Egypt's largest pyramid. Rock glaciers are an overlooked water source because they release meltwater year-round, including late in summer when other sources run low.

Hampi is a UNESCO World Heritage Site in Karnataka, India, with more than 1,600 surviving remains spread over 4,100 hectares. It was the capital of the Vijayanagara Empire from 1336 to 1565. Travellers from Persia and Portugal described it as a prosperous, wealthy and grand city with temples, markets and farms along the Tungabhadra River. By 1500 it was estimated to be the world's second-largest city after Beijing, and probably India's richest at the time. In 1565 a coalition of Muslim sultanates defeated the Vijayanagara Empire, its capital was conquered and destroyed, and the city was left in ruins. Hampi remains a religious centre, with the active Virupaksha Temple at its heart.