Jesse Van Rootselaar, 18, created the virtual “experience” on the online gaming platform Roblox before his terrifying real-life rampage, a rep for the company confirmed.

A mathematical trick speeds up seismic calculations for earthquake simulations and could revolutionize earthquake preparedness.

Plenty of our childhoods had at least one math teacher who made the (ultimately erroneous) claim that we needed to learn to do math because we wouldn’t always have a calculator in our ...