From microscopic “smart dust” tracking devices to DNA-tracing tech and advanced facial recognition software, journalist Sharon Weinberger leads a hair-raising tour through the global, unregulated bazaar of privatized mass surveillance. To reign in this growing, multibillion-dollar marketplace that often caters to customers with nefarious intents, Weinberger believes the first step is for governments to classify surveillance tools as dangerous and powerful weapons.

Your mortal enemy has captured you and hooked you up to a bizarre experiment. He’s extended your nervous system with one very long neuron to a target about 70 meters away. At some point, he’s going to fire an arrow. If you can then think a thought to the target before the arrow hits it, he’ll let you go. So who wins that race? Seena Mathew examines the speed of thought. [

Here’s a talk about tears — and why crying isn’t something to be afraid or ashamed of. Exploring the science behind the mood-boosting power of crying, childbirth and lactation educator Kathy Mendias shows how tears can enhance your physical and mental well-being and deepen your relationship to yourself and others.