Articles with 200-400 Words

On November 12, 2025, the United States (US) Mint made its final penny at the Philadelphia facility, ending more than 230 years of production. This landmark moment closed an era that began with the first cent in 1793 and continued through the Lincoln cent in use today. The decision to halt production was driven primarily by cost. By 2024, each penny cost nearly four cents to make. This resulted in substantial annual losses for the Mint....

Researchers have found the largest spider web ever recorded inside a sulfur-rich cave along the Greece–Albania border. The "spider megacity" covers an astounding 1,140 sq ft (105 sq m). This is about the size of a small apartment. This remarkable discovery was revealed by biologist István Urák and his team on October 17, 2025....

Thousands of elk, deer, and other large animals move across Colorado each year. They graze in the lowlands during winter and return to the mountains in summer. But their paths often cross busy highways. This can make their migrations very dangerous. One of the most hazardous spots is Interstate 25 between the towns of Larkspur and Monument. More than 100,000 vehicles pass there every day. With six lanes cutting through thousands of acres of wildlife habitat, collisions between animals and cars are all too common....

Uranus and Neptune are often called "ice giants." This is based on the theory that they were made from materials that easily freeze in space, like water and ammonia. However, this label does not come from direct observations, since no spacecraft has visited the two giants since Voyager 2 in the 1980s. Instead, it is drawn from computer models built using the planets’ sizes, masses, densities, and gravity fields. Now, a new study by scientists at the University of Zurich is challenging this idea. It suggests that the two planets may contain more rock than ice....