Researchers have developed scalable lightsails, ultra-thin, reflective structures that use laser-driven radiation pressure to achieve incredible speeds.

On a scale of 1—10 ... They work by slowing hair growth and reducing strand thickness by using highly concentrated light to penetrate hair follicles and inhibit future hair growth.

By Roger Kennedy [email protected] Some men embrace male pattern baldness gracefully if they have it in their family. It might not bother them. However, for some men, baldness ...