On a spring morning, a search for a specific species of fern leads to a discussion on ancient plant history, vascular beauty ...

Apr. 28, 2025 — A technique to cool the planet, in which particles are added to the atmosphere to reflect sunlight, would not require developing special aircraft but could be achieved using ...

A twin pregnancy is when there are two fetuses in the uterus at the same time. Twins can be identical, meaning they developed when a single fertilized egg split early in development, or fraternal, ...