Details: Since the beginning of humankind, we ve gazed into the night sky wondering what s out there. Our early ancestors saw patterns and pictures, invented legends that they passed through generations. Now, thanks to the scientists and astronauts of NASA, we ve begun to explore. But no matter what we discover or how far we go, we will always want to go further. That s just human nature. We ll always be staring into the sky, and that s why we made these Stargazers Crew Socks, featuring the iconic NASA logo. These socks glow in the dark! Hold them up to light or walk outside in the sun before turning off the lights to watch the special thread glow.