A team at the Paris Observatory just clocked the exhaust of 3I/ATLAS at closest approach to the sun. Half the speed any known comet produces. And the gas moves faster toward the Sun than away from it. Every comet ever measured pushes gas away from the heat. 3I pushes into it. They also ran a full chemical inventory. The carbon-oxygen fuel stock is concentrated. Sulfur, the element that poisons every high-energy system we know how to build, is gone. Below the range of any known comet. Briefing...