Laser diodes are semiconductors that generate light and amplify it using repeated reflection or "optical feedback." Once the ...

Sheets that keep you cool are light and airy, like linen and cotton. You’ll probably want to avoid thicker sheets like jersey and flannel. Since hotels change and wash sheets daily, they need a ...

Fortune’s Term Sheet newsletter covers the latest news, insights, and analysis on private equity, venture capital, start-ups, mergers and acquisitions, high-value deals, and the dealmakers ...