Interesting fact:

Here's a nutty fact for you: Peanuts, walnuts, coconuts, Brazil nuts, macadamia nuts, pecans, almonds, cashews, and pistachios all aren't really nuts, but acorns are. Botanical nuts are dry, one-seeded fruits that are fused to a hardened shell. The hazelnut is one nut called a nut that actually is a nut.