UnScramble this Word: r s a n e c o?

Questions

[pot luck] which australian outlaw said just before he was hanged "such is life"?

[pot luck] what number is signified by the prefix @mega'?

[pot luck] what are penny buns, puffballs and stinkhorns?

[pot luck] with which organ does a snake hear?

[pot luck] what exactly is 'big ben'?