Ufo -

"It wasn't making any noise," Mark recalled. "No propeller, no exhaust, no sound of any kind."

Then, the craft moved, but it didn't travel like a plane. "It started flying away," Mark said, "but it changed direction like a pool ball bouncing off a cushion—a sharp, 90∘90 raised to the composed with power angle at high speed." "It wasn't making any noise," Mark recalled

The most jarring aspect was the lack of visible propulsion. As they watched, the large disc rotated on its axis nearly 90∘90 raised to the composed with power As they watched, the large disc rotated on

It was 1978, and Mark, a UCLA physics major, was driving through the Nevada desert with his friend to switch driving shifts. At 21 years old, Mark believed in what he could measure, analyze, and prove. That night, however, the laws of physics he was studying seemed to vanish in the cold mountain air. The object made several of these impossible, abrupt

The object made several of these impossible, abrupt turns, behaving in a way that defied the inertia and physical laws that govern human aircraft. Mark, overwhelmed and shaken, felt his scientific understanding crumble.

The silent, metallic disc seen by a former physics major in the late 1970s while driving near Reno, Nevada, is a quintessential example of unexplained encounters with UFOs.

Mark followed his gaze. About 300 yards away, hovering roughly 200 feet above the pine tree tops, was a large, silent, metallic disc. It was roughly 40-50 feet in diameter and perfectly smooth, save for a smaller, rotating disc attached to the underside, which appeared to have portholes.