Artificial light makes the modern world possible. But not all kinds of light are good for us. Electric light has fundamentally altered our lives, our bodies and the very nature of our sleep.
Nature's inventiveness often inspires human innovation, as in the well-known case of Velcro. Learn about other inventions featured in "Hidden Heroes: The Genius of Everyday Things," an exhibit currently on display at the San Jose Museum of Art.
New research shows that market squid may have something to offer the engineering sector: skin cells that can switch between transparent and white. Humans could use these cells to develop new bio-inspired materials; squid probably use them for cross-dressing.