A dust devil is a rotating updraft that forms when hot air near the ground rises quickly through a small pocket of cooler, low-pressure air above it, picking up dust and debris as it spins. Formed most often over flat, barren terrain, dust devils are typically less than 3 ft (0.9 m) wide, reach maximum wind speeds of 45 mph (72 km/h), and dissipate in less than a minute. Though usually harmless, some are strong enough to pose a real danger. On what other planet have dust devils been observed?
Back in the day
Though the Bureau of Indian Affairs was given jurisdiction over trade with Native Americans and was responsible for protecting them from exploitation, it had little success safeguarding Native American rights and, instead, evolved primarily into a land-administering agency. It now acts as trustee over Native American lands and funds, promotes development, and provides Native Americans with various social services. Why is the Bureau involved in a class-action lawsuit against the US government?
Born on a day like today
Australian-American publishing magnate Rupert Murdoch established News Corporation in 1980 as a holding company, but it has since developed into a worldwide communications empire. Included among the many assets of Murdoch's News Corp are powerful media holdings in Australia and New Zealand, the prestigious Times of London and other British papers, and the New York Post, TV Guide, and HarperCollins book publishers in the US. What is News Corp's annual revenue?