Maddy has a degree in biochemistry from the University of York and specializes in reporting on health, medicine, and genetics. Obsidian is perhaps best known in its role as the dark black blade atop ...

Snowflake obsidian is a form of volcanic glass that features white or grayish “snowflake” shapes made of embedded cristobalite. These pretty patterns are not artificially added as a cheap holiday ...

Ever had a headache so big, you felt like drilling a hole in your head to let the pain out? In Neolithic times, trepanation – or drilling a hole into the skull – was thought to be a cure for ...

There are three types of rock found on Earth. These are igneous, metamorphic and sedimentary. Each rock type is formed in a different way. For example, the rock malachite is mostly made of the ...