In addition to Nordstrom, the Kopari Sun Shield On-The-Glow Sheer Sunscreen Stick can be purchased on Ulta, Target, Anthropologie, and Kopari. You can save 10% ($3 off) on Kopari’s website when ...

But just blocking 1% of the sun's rays would be a major effort. According to Hermanson's calculations, the shield would need be big. Really big. Like the size of the country of Peru big.

Engineer James Early first suggested it in 1989, when he claimed that a giant glass shield could help deflect sunlight away from Earth. It’s cropped back up in various papers, and in different ...

Lignin nanoparticles (LNPs) have emerged as promising candidates for enhancing sun protection in cosmetics, offering superior UV-blocking capabilities compared to soluble lignin oligomers. However ...