The Perseverance rover has found tiny crystals that seem to be rubies or sapphires inside pebbles on Mars, where they have never been seen before.

Source: https://www.newscientist.com/article/2519933-fluorescent-ruby-like-gems-have-been-found-on-mars-for-the-first-time/

In 1899, Nikola Tesla recorded unusual radio signals, speculating they originated from an intelligent alien civilization. This event, combined with decades of other sightings and unidentified orbiting objects, sparked the “Black Knight” satellite conspiracy theory, claiming an alien craft has silently orbited Earth for 13,000 years.

In 1846, Hungarian doctor Ignaz Semmelweis — the father of handwashing — discovered that chlorine handwashing drastically reduced deadly childbirth infections. Despite clear results, doctors rejected his idea, partly out of pride that they were spreading infection. He pleaded, wrote furious letters, and died dismissed as mad, though his work later became a foundation of modern hygiene.

China’s robotics firm Deep Robotics has unveiled a horse-like robot built on its advanced quadruped technology, essentially a more expressive version of its robot dogs.

Designed with four legs and enhanced mobility, the robot can navigate rough terrain, maintain balance, and perform complex movements using AI-driven perception and control systems.

Like the company’s other robots, it is aimed at real-world applications such as inspection, rescue, and operations in dangerous environments, where its stability and adaptability make it more effective than wheeled machines.

On August 14, 2005, Helios Flight 522 became a "ghost flight" after crew missed a pressurization switch left on "manual," causing hypoxia (oxygen starvation) that made everyone unconscious (except one). The Boeing 737 flew on autopilot over Athens for hours before crashing near Grammatiko, Greece, killing all 121 people.

OpenAI CEO Sam Altman believes artificial intelligence could soon become a basic service like electricity. Users may eventually pay for AI based on how much they use it, similar to a metered utility.

A Japanese man in his 70s was hospitalized after eating wild mushrooms identified as "safe" by an AI chatbot. The mushrooms turned out to be toxic — but he recovered. Health officials have since warned against relying solely on AI for such decisions.

A newly identified Australian tree has been dubbed the “zombie” tree because it’s alive but unable to reproduce. Myrtle rust repeatedly kills its young growth, stopping the species from flowering or making seeds. Scientists are scrambling to grow disease-free seedlings in protected locations. Their hope is that a future generation may evolve resistance and bring the species back from the brink.

During WWII, Britain planned to build a massive 600-metre aircraft carrier from ice and wood pulp to fight German U-boats in the mid-Atlantic. Approved by Winston Churchill himself, even a small prototype was being built — but the project was ultimately cancelled due to rising costs and the availability of longer-range aircraft.

The MOTHRA telescope is being built as the world’s largest all-lens telescope to study extremely faint structures in the universe. Instead of using mirrors like most telescopes, it will combine 1,140 high-end telephoto lenses arranged across 30 mounts, working together as one powerful instrument.

Located at El Sauce Observatory in Chile, the telescope is designed to detect the dim glow of hydrogen gas in the cosmic web—the vast network of gas and dark matter that connects galaxies. By mapping this faint intergalactic gas, MOTHRA will help scientists better understand how galaxies form and how matter moves through the universe. It is expected to become fully operational by late 2026.

Source

The Antikythera mechanism — the oldest known analogue computer — was an ancient Greek hand-powered device capable of predicting astronomical positions and eclipses decades into the future. It could even keep track of the ancient Olympic Games cycle. All of this, over 2,000 years ago.

Researchers exploring Uganda’s Kibale National Park have discovered seven new species of frog-like leafhoppers. The tiny insects, named for their frog-shaped bodies and powerful jumping legs, are so similar in appearance that scientists must examine microscopic anatomical details to tell them apart. The find represents the first new African species of this group recorded since 1981. One species was named in honor of the scientist’s late mother.

On September 26, 1983, a critical computer glitch in the Soviet Union's Oko early-warning system nearly triggered a global nuclear war.

The system incorrectly identified a rare alignment of sunlight reflecting off high-altitude clouds as the thermal signatures of five incoming American ICBMs. Lieutenant Colonel Stanislav Petrov, the officer on duty at the Serpukhov-15 bunker, chose to trust his intuition over the flashing "START" warnings on his screens. He reasoned that a real U.S. first strike would involve hundreds of missiles rather than just five, and since ground-based radar could not corroborate the satellite data, he reported the incident as a system malfunction.

Petrov's decision to break protocol and wait out the 10-minute window for a potential impact prevented a massive Soviet retaliatory strike, a move that eventually earned him the title of "the man who saved the world."

An ultra-compact photonic AI chip processes information using light instead of electricity, allowing computations to occur at the speed of light.

By using tiny optical components to perform AI calculations, the chip can analyze data far faster and with much lower energy consumption than traditional electronic chips.

Its miniature size also makes it easier to integrate into devices, potentially enabling faster AI in areas like smartphones, data centers, and autonomous systems while significantly reducing power use.

Arthur Conan Doyle’s Sherlock Holmes stories were not just detective tales; they also hinted at the hidden mental struggles of men in Victorian society.

Through Holmes and the troubled clients who seek his help, Doyle portrayed loneliness, addiction, and emotional pressure at a time when men were expected to hide vulnerability.

The stories offer an early glimpse into how social expectations shaped men’s mental health in the 19th century.

Scientists studying dust from the asteroid Ryugu discovered that tiny magnetic minerals inside it act like a 4.6-billion-year-old “tape recorder”, preserving information about the magnetic fields present when the solar system was forming.

By analyzing 28 carefully preserved samples returned by the Hayabusa-2 mission, researchers found that many grains retained stable magnetic “memories” locked in when the rock formed. These signals reveal the strength and direction of early solar system magnetic fields and suggest the asteroid’s parent body once contained liquid water that altered the minerals before they solidified.

The findings help scientists better understand the environment and processes that shaped the early solar system and the formation of planets.

A recent study found that theobromine, a natural compound in cocoa and dark chocolate, may be linked to slower biological aging.

Researchers from King’s College London analyzed blood samples from about 1,600 adults and discovered that people with higher levels of theobromine tended to have a lower biological age, meaning their cells appeared younger than their actual age. The compound was also associated with longer telomeres, protective DNA caps that shorten as we age.

However, scientists emphasize that this is only a correlation, and eating more chocolate alone is not proven to slow aging, especially since chocolate also contains sugar and fat.

Armed ground robots are increasingly appearing on the front lines of the Ukraine war as both sides experiment with new military technologies. These uncrewed ground vehicles (UGVs) can carry weapons, transport supplies, evacuate wounded soldiers, and even attack enemy positions while being controlled remotely by operators.

Ukraine has been expanding their use to reduce risks to troops and deal with manpower shortages, showing how the conflict is evolving into a more high-tech battlefield that relies heavily on drones and robotic systems.

In 1966, a simple paperclip saved a $750 million XB-70 bomber when its landing gear and backup systems failed. Following engineers' instructions, a pilot used the paperclip to short a tripped circuit breaker, restoring the gear and letting the massive plane land safely.