Bats are often called blind, but that idea is wrong: every bat species has functional eyes and can see. About 70 percent of bat species, mainly the microbats, use echolocation to find their way and catch insects, emitting high-pitched calls and reading the returning echoes. Fruit bats, known as megabats, mostly do not echolocate at all, and they rely on excellent night vision and a good sense of smell to find food. The accurate picture is that bats combine sight and sound in different ways depending on species and habitat.

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.