Ever wonder how Earth scientists examine rocks? We cut them up and throw them under a microscope ... and then everything ...

Lignite, also called brown coal, is a soft, brown ... while igneous rocks are formed from magma and contain minerals like feldspar. By combining chemical data with what they saw under the microscope, ...

In his more than 30-year career with the News Hour, Brown has served as co-anchor, studio moderator, and field reporter on a wide range of national and international issues, with work taking him ...

After hours: March 21 at 6:17:08 PM EDT Loading Chart for BRO ...