Humanitarian aid is essential following systemic violence and displacement, but it cannot build durable solutions on its own.

Even though it is hotter than the surface of the Sun, the crystallized iron core of the Earth remains solid. A new study may finally settle a longstanding debate over how that's possible, as well as ...

Inner planets are the four planets closest to the Sun: Mercury, Venus, Earth and Mars. They are collectively characterized by a solid surface and small size relative to the outer gas giants. Analysis ...