If you draw with a pencil, you can tell how soft the graphite inside is. Pieces of graphite break off to leave the pencil mark. But can you imagine drawing with a diamond? Diamonds and graphite are ...

Thundereggs look like regular rocks from the outside, but contain intricate and colorful mineral patterns inside — often made ...

What is the rock cycle? There are three types of rocks — igneous, sedimentary, and metamorphic — that have formed over time in the Earth's different layers. A rock can begin as one type and can change ...

Sedimentary rocks are made up of pieces of older rocks (igneous, metamorphic, and sedimentary) and organic remains (shells, bone, etc.). When rocks break apart from erosion they are transported by ...

Test your rock & mineral smarts—are you a Rock Star? Think you know rocks and minerals? Take the Science Trek quiz! Test your smarts on gold, salt, Earth’s oldest rocks, gemstones on Mars, and the ...

Despite seeming like a relatively stable place, the Earth's surface has changed dramatically over the past 4.6 billion years. Mountains have been built and eroded, continents and oceans have moved ...

While landscaping brings greenery to many people’s minds, rocks are an important part of landscaping, too. Perhaps more accurately a hardscaping element, the various types of landscaping rocks add a ...

Astronomers have discovered never-seen-before rock types, made up of unusual ratios of minerals, within the remains of alien worlds ripped apart by their dying host stars. The research suggests that ...