CrunchLabs, the maker of STEM activity kits for kids founded by NASA engineer turned YouTube science communicator Mark Rober, has launched Class CrunchLabs, a collection of free standards-aligned ...

Magnitude scales can be used to describe earthquakes so small that they are expressed in negative numbers. The scale also has no upper limit. Learn more about how we measure earthquake magnitude.

ngx_pagespeed speeds up your site and reduces page load time by automatically applying web performance best practices to pages and associated assets (CSS, JavaScript, images) without requiring you to ...