Crystalline silica is a common mineral found in the earth's crust. Materials like sand, stone, concrete, and mortar contain crystalline silica. It is also used to make products such as glass, pottery, ...

Methane clathrate, or "methane hydrate," is a solid compound in which a large amount of methane is trapped within the crystalline structure ... the methane clathrate crust thickness to five ...

Arguably the most fascinating moon in the Solar System is the Saturn satellite Titan, which has the only known body with liquid seas and rivers (of methane) on its surface. A new study suggests ...