Obsidian is a volcanic glass used to make tools for Stone-Age man – and for modern surgeons.

Obsidian originated from a geological formation known as the Trans-Mexican Volcanic Belt, spanning 621 miles (1,000 kilometers) from the west to east coasts in central Mexico, the study authors noted.

One way Obsidian is able to unleash Avowed, Grounded 2, and The Outer Worlds 2 within a single year is partly because of its ethos as a group: "Perfect is the enemy of the good," says Urquhart.

Obsidian, the indie darling of notetaking apps, rejects everything you know about modern software. And it's working.

A new analysis of hundreds of obsidian artifacts from the Aztec Empire has revealed the vast trade networks that supplied obsidian, sometimes even from rivals. CNN values your feedback 1.