Shark

So far their work with sonic-tagged lemon sharks indicates that this species is active both day and night (with an average speed of slightly over… Read More »How Fast Can A Lemon Shark Swim?

Bull sharks have been known to kill alligators and crocodiles but the opposite can also happen alligators and crocodiles can kill bull sharks. In effect… Read More »Do Alligators Attack Bull Sharks?

The bull shark is a large active predator. The biggest females can reach 4 metres (about 13 feet) in length and weigh as much as… Read More »How Big Is Big Bull The Bull Shark?

Whirlwind. The first vacuum cleaner, the “Whirlwind,” was invented in Chicago in 1868 by Ives W. McGaffey. The Whirlwind was difficult to use because the… Read More »What Is The Oldest Vacuum Cleaner?

6 Things You Should Never Vacuum Up Glass. A broken glass is a big mess, but don’t reach for your vacuum cleaner to pick it… Read More »What Should You Not Vacuum?

1908 –William Henry Hoover produces the first commercial bag-on-a-stick upright vacuum cleaners. 1912 -First Hoovers imported to Britain. 1912-15- Axel Wenner-Gren in Sweden collaborates with… Read More »What Was The First Upright Vacuum?

There are varying degrees of quality and value when it comes to vacuums; if you paid a lot for the appliance, repairs are likely worth… Read More »Is It Worth Getting A Vacuum Repaired?

Most robotic vacuum cleaners have a lifespan between 4 and 6 years, with some variation due to lifestyle, accidents, and brand. There are several ways… Read More »How Long Do Smart Vacuums Last?

eight years. According to Consumer Reports, vacuum cleaners last a median of eight years. But the lifespan varies wildly by not only brand but your… Read More »How Long Does The Average Vacuum Last?

If you get a more affordable model, like Roomba 675 you can expect a lifespan of up to two years. Go to the higher-end, like… Read More »How Often Should You Replace Robot Vacuum?