Rio carnival dancers sparkle in greatest show on Earth

It is dubbed the 'greatest show on Earth' with thousands of sparkling Brazilian dancers ignoring sweltering heat to put on a spectacular samba parade.Rio de Janeiro came alive on Sunday night as the city's carnival hit its peak in a stunning cocktail of glamour, eccentric costumes and pounding samba anthems.   The two-night extravaganza began in the Sambodromo, where 72,000 spectators sat in roasting conditions, with many thousands more milling around outside selling drinks, putting on colour...