Who are the main adversaries of Commander Shepard in Mass Effect 2, who abduct human colonies?

The Collectors

What animal does Merida famously follow into the woods in "Brave"? Who deceived Samson, discovering the secret of his strength? What is the real name of Tim Allen's character in "Christmas with the Kranks"? Which compound is used as household bleach? Who was chosen as president by the House of Representatives after an electoral tie in 1800?