The immigration bill now under consideration by the Senate calls for drones to patrol the U.S. border 24/7. Supporters say that means more drones are needed. But critics argue there's no evidence the drones already flying are cost-effective.
Every night for thousands of years, bats have poured out of the Bracken Cave Reserve, near San Antonio, by the millions. But conservationists are worried that plans for a housing development nearby will disrupt the bats' rural habitat.
On Monday, Apple announced iRadio — its entry into the crowded field of music streaming services. iTunes has become the top music retailer by selling song files. But no one in the music business thinks the iTunes model is the future. Pandora is the oldest and most successful streaming service so far. But it's been a disappointment to investors.