A lot of old photos from the 19th and early 20th century are fraught with doom and gloom—and on the occasion the literal dead face. That led to the popular belief that people just did not smile in old photographs. The common explanation is due to the limited technology at the time to capture a smile. Exposure times were long and the thinking was it’s easier to hold a serious expression over a long period. Another theory included early photography being heavily influenced by painting (which meant no smiling).
The technology, according to Musk — who brought up the idea at Recode’s Code Conference last year — is a “digital layer” located above the cortex, built into the brain. Musk calls the technology, which would intertwine computers and the human brain, “neural lace.”
Deep underground lie stores of once-inaccessible natural gas. There’s a technology, called hydraulic fracturing, or “fracking,” that can extract this natural gas, potentially powering us for decades to come. So how does fracking work and why is it a source of such heated controversy? Mia Nacamulli explains the ins and outs of fracking.