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gemologists
so he sets out on a journey through the solar system to find out why in this funny and fact-filled romp that’s perfect for fans of The Scrambled States of America
A Caldecott Honor Book
Prehistoric Pasta Server
Greater knowledge―Use the fun sidebars to dive deeper into the fossil world and get more hands-on learning
Libyan Desert Glass, Created By Meteorites In The Sahara STEAM gemologistsAlso known as Great Sand Sea glass, Libyan Desert glass is a type of tektite formed when exposed to extreme heat and pressure. Libyan Desert glass is believed to have been created by meteor airbursts and impacts in the Sahara, near the border of present day Libya and Egypt, 29 million years ago. The glass is almost pure silica and would have required temperatures above 1,600 C to form hotter than any igneous rock found on earth. When not polished to a