Tracy Sun: Poshmark Co-Founder

<p>Tracy Sun may&nbsp;be at the helm of the impressive fashion-tech startup Poshmark, but she doesn't consider herself a "fashion person." She studied biology and psychology in college with the intention of pursuing a career in neuroscience. Little did she know that she would trade medical school for business school and&nbsp;leave behind New York City for the tech mecca that is Silicon Valley. Sun explains how she made the transition from science to startup in episode 12 of&nbsp;<em>Second Life</em>.</p>