NEW QUIZ: Who's the fastest, toughest and craziest?

Test your knowledge on facts about some of the great climbers, hikers and explorers in history.

This week we'll be picking your brains on fantastic achievements and world records.

This is your second of four chances to win one of 10 pairs of Bridgedale Bamboo Socks.

The socks are available in men's and women's specific fits and colours

The socks are available in men's and women's specific fits and colours

These socks are made using using naturally silky, breathable and anti-microbial bamboo yarns and feature Coolmax fabric that wicks water away from the skin.

The socks are developed in partnership with the Plant A Boo(tm) Foundation - a campaign to fight global warming through increased bamboo cultivation.

Click on the window below to get started and answer the Prize Question at the end for your chance to win.