Bricks are often made of a lightweight rock called shale. It's ground up into a thick paste that is pressed into the standard brick shape. Then the bricks are cooked in a giant oven at 1,040 degrees Celsius. That's almost 2,000 degrees Fahrenheit! Watch full episodes of the Science Channel series "How It's Made" on the Science GO app or at: http://insder.co/HowItsMade The INSIDER team believes that life is an adventure! Subscribe to our channel and visit us at: https://thisisinsider.com/ INSIDER on Facebook: https://www.facebook.com/thisisinsider/ INSIDER on Instagram: https://www.instagram.com/thisisinsider/ INSIDER on Twitter: https://twitter.com/thisisinsider Produced by: Natalie Fennell, Laura Bilash