Which creature is known as the only poisonous mammal?

Male platypus

What moon phase is most closely associated with Halloween imagery? What Italian sauce made from tomatoes, garlic, olive oil, and basil is commonly used on pasta? Who developed the doctrine of nonviolent civil disobedience known as Satyagraha? In "A Very Harold & Kumar Christmas," who makes a surprise return playing himself? In degrees, what is one full rotation equal to?