The latest estimate is that the Chelyabinsk meteor was about 56 feet (17 meters) across, weighed more than 7,000 tons and was moving about 18 kilometers per second (40,000 mph) when it blew apart, she said. February 28, 2013 -- Updated 1755 GMT (0155 HKT) February 28, 2013 -- Updated 1620 GMT (0020 HKT) The church is beset by problems, Timothy Stanley says. New pope must move beyond travails and reinvigorate Catholicism. February 28, 2013 -- Updated 1900 GMT (0300 HKT) Zambian economist Dambisa Moyo says the future is bright for Africa, and that China can play a key role in its development. February 28, 2013 -- Updated 1431 GMT (2231 HKT) If humanitarian reasons are not enough, the U.S. and its allies should weigh the damage of doing nothing to stop the war in Syria, Frida Ghitis says. February 27, 2013 -- Updated 2325 GMT (0725 HKT) In the foothills of California's Sierra Nevada mountains, artists are partnering with doctors and scientists to create life-changing products. February 28, 2013 -- Updated 1809 GMT (0209 HKT) The Mobile World Congress offered up some weird technology. Here are a few of the stranger sights that were creating a buzz. February 28, 2013 -- Updated 0348 GMT (1148 HKT) Erin Burnett talks to millionaire Dennis Tito about his ambitious plan to send a middle-aged married couple to the Red Planet. At least, that's what Mark and Bill say.