Sheets accumulate skin residues that feed dust mites, while in towels the humidity can encourage microbial proliferation. Regular washing and correct drying help limit these phenomena, even if there is no universal time threshold beyond which fabrics become dangerous. The American Cleaning Institute (ACI) speaks clearly: the sheets should be washed every two weekswhile the towels after 3-5 uses. What ...
The regional capitals where it is most expensive to both buy and rent a house are Milan, Florence and Rome. The cheapest are all found in the South. The most renowned tourist locations, both at the seaside and in the mountains, also contribute to raising the average regional prices. Compared to 10 years ago, buying or renting a house in ...
There is a rule to understand at a glance whether a number is divisible by 11. Simply add and subtract the digits of the number alternately and check if the result is a multiple of 11. But why does this trick work? The numbers divisible by 11 they are very easy to identify. In fact, there is a very simple ...
Where The Light Sleeps is a video game that recreates some environments of the Sassi di Matera through photogrammetry, a technique that allows photographs to be transformed into 3D models: free, it was created during a 48-hour hackathon by six developers. Photographs allow you to observe a place, but with the right technology they can even transform it into an ...
The suburbs of large Italian cities are always frequented by urbanized foxes, adapted to consuming waste and more accustomed to human presence. Their domestication could lead to changes that are reminiscent, at least in part, of dogs. A reddish flash illuminated by the car headlights, a fleeting apparition behind a dumpster or among the trees in the park: the suburbs ...
A Learjet 60 crashed in Florida: 9 people on board died, including the CEO and family members. The NTSB investigates the cause of the fatal dive. Among the hypotheses: turbulence, ice, technical failures or spatial disorientation, which caused loss of control and overspeed. A jet private crashed in Florida in a fireball, leaving a crater in the ground. Fortunately there ...
Sixty years ago, the Florence flood of November 4, 1966 mobilized young volunteers from all over Italy and the world, who arrived in the city to lend a hand. A fleet of boys who, armed with buckets and brooms, cleaned up the Tuscan capital and contributed to saving its artistic heritage: this was how the “Mud Angels” were born. The ...
PhotoTat is a tattoo ink under study composed of photochromic molecules. Almost invisible, it colors in seconds with UV light and erases with intense white light. The new technology could be used for medical tattoos visible only in clinics, but it has only been tested on one person and safety has yet to be proven. PhotoTat it’s a “rewritable” tattoo ...
In the Spiral of Ulam the prime numbers are not arranged randomly, but occupy diagonal lines that have to do with relatively simple formulas. In 1963, to pass the time during a boring conference, the Polish-American mathematician Stan Ulam began writing down the natural numbers in the shape of a spiral, later deciding to circle only the prime numbers. This ...
Collision between two AS350 helicopters on Everest, Nepal. At around 4,200 metres, with thin air and without a control tower, the landing leaves very little margin for error for the pilots. The causes have not yet been clarified by the authorities. Today, November 3 2026, two helicopters AS350 yes they are clashed as they landed at the heliport of Pherichein ...