Ta-da! Our fifth special episode with Cristina Quinn and Alison Bruzek of Trace Elements is here. Let us know what you enjoyed about their series and what surprised you in the comment section below. In just five episodes they've covered the science of feeling no fear, illusions with robots, bio-hacking, a mystery at a lake, and this time...
Birds of a feather may flock together -- but it turns out birds that live in the city sing at higher frequencies, louder, and more often than their rural fr...
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