Who retrieved Cerberus from the Underworld alive as one of his Twelve Labors?

Heracles

In poker, which hand ranks immediately below a royal flush? In which city is the Australian Open tennis tournament held? In soccer, what is the minimum number of players a team must have on the field? Which pioneering female journalist famously traveled around the world in less than 80 days in 1889–90? Which planet in our solar system is most similar to Earth in terms of gravity?