The toilet paper holder was invented by Seth Wheeler in 1883. Wheeler, an American inventor, patented the design for a perforated toilet paper roll with a holder. His invention revolutionized the way toilet paper was used and stored in bathrooms, making it more convenient and hygienic for people to access. Today, the toilet paper holder is a common fixture in bathrooms worldwide. **

The concept of pumped storage hydroelectric power plants was first developed by the Swiss engineer, Eduard Stamm, in the 1890s. However, the first operational pumped storage plant was built in 1929 in Switzerland by the engineer Ludwig Kuhn. This innovative technology allows for the storage of excess electricity by using it to pump water to a higher reservoir, which can then be released to generate electricity when demand is high. **

The World Wide Web was invented by British computer scientist Tim Berners-Lee in 1989 while working at CERN, the European Organization for Nuclear Research. Berners-Lee's invention revolutionized the way information is shared and accessed on the internet by creating a system that allowed documents to be linked together using hypertext. His work laid the foundation for the modern internet as we know it today. **

The exact origins of pudding are unclear, but it is believed to have been invented in ancient times by various cultures around the world. The modern concept of pudding, as a sweet dessert made with milk, sugar, and thickening agents like cornstarch or eggs, evolved over time through different culinary traditions. **

Gelatin was invented by Peter Cooper in 1845. Cooper, an American industrialist and inventor, discovered a way to extract gelatin from animal collagen by boiling animal bones. This invention revolutionized the food industry and led to the creation of various gelatin-based products such as Jell-O. **

Klingon was invented by linguist Marc Okrand in the 1980s for the Star Trek film series. Okrand was hired to create a fully developed language for the Klingon species in the movies, which eventually led to the creation of the Klingon language. He developed a vocabulary, grammar rules, and pronunciation guide for the language, which has since become a popular and fully functional constructed language used by fans and enthusiasts. **

Floorball was invented in Sweden in the late 1960s. The sport was created as a way to provide a winter training activity for Swedish hockey players. The rules and equipment were developed to make the game safe and accessible for players of all ages and skill levels. Today, floorball is played worldwide and continues to grow in popularity. **

Length as a concept has been around since ancient times, with different civilizations developing their own units of measurement. The concept of measuring length is believed to have originated with the ancient Egyptians, who used body parts like the cubit to measure distances. Over time, standardized units of length were developed by various cultures, such as the foot, yard, and meter, leading to the modern systems of measurement we use today. So, it is not accurate to attribute the invention of length to a single individual, as it has evolved over centuries through the contributions of many different cultures. **