Gathered in the yard of a small home in the Venezuelan countryside, a young man with dreadlocks asks a bearded musician clutching a guitar: "Who can Chavez rely on?"

Brazil's Agriculture Ministry said on Friday that the country had registered no cases of mad cow disease, denying reports on some local media websites that said the disease had cropped up in the southern state of Parana two years ago.

President Barack Obama defeated Mitt Romney to hold the office of the presidency until 2016 and while many were happy and sad, a different race was going on social media.

Marissa Mayer, who earned a reputation for decisive action and intensity during her 13-year stint at Google Inc, has spent her first months as Yahoo Inc CEO quietly moving the Internet pioneer back to its roots in technology.

Michelle Obama wowed Americans with an emotional speech at the Democratic National Convention that set the Twitterverse alight with gushing praise and boosted husband Barack Obama's social media standing as he makes his bid to stay in the White House.

After months of speculation, Apple has announced a media event for Sept. 12 at 10 a.m. Pacific Time at San Francisco's Yerba Buena Center for the Arts.