According to Chinese military experts, they have created a novel cooling mechanism that enables high-energy lasers to run “infinitely” without producing any waste heat. South China Morning Post claims that researchers at the National University of Defence Technology in Changsha, Hunan province, claim that the novel cooling system fully avoids the dangerous heat produced by high-energy laser operation.

Japanese Prime Minister Fumio Kishida warned of Russia’s nuclear threat and reaffirmed a pledge to work to make the world free of nuclear weapons in a speech marking 78 years since the atomic bomb fell on Hiroshima on Sunday. “As the only country to have experienced the horror of nuclear devastation in war, Japan will press on tirelessly with its efforts to bring about ‘a world without nuclear weapons,’” Kishida said in remarks delivered in Hiroshima, in a tribute to the victims, their families and those still suffering aftereffects of the bomb.

The magnetohydrodynamic (MHD) drive certainly sounds like something out of science fiction — using an array of magnets and electrodes, this high-tech propulsion technology promises to silently propel a craft through the water without any moving parts. As long as you can provide it with a constant supply of electricity, anyway.

Of course, as is often the case, the devil is in the details. Even with the obvious scientific and military applications of such a propulsion unit, scaling MHD technology up has proven difficult. But as [Jay Bowles] of Plasma Channel shows in his latest video, that doesn’t mean you can’t experiment with the concept at home. Even better, getting verifiable results is much easier than you’d think.

While [Jay] usually won’t even get out of bed for less than a dozen kilovolts, a standard bench supply is all you need to power your very own MHD. He ran his experiential drive at a maximum of 25 VDC/9 A, but he was getting results with just 5 VDC/1.5 A. Beyond that, it’s just a matter of cutting some electrodes out of metal stock and placing them on either side of the most powerful magnets you can get your hands on. Add in a 3D-printed structure and some pieces of acrylic, and you’re halfway to a bathtub rendition of The Hunt for Red October.

The US dispatched four navy warships as well as a reconnaissance airplane after multiple Chinese and Russian military vessels carried out a joint naval patrol near Alaska last week.

The combined naval patrol, which the Wall Street Journal first reported, appeared to be the largest such flotilla to approach US territory, according to experts that spoke to the outlet.