Though 70% of the Earth is covered in water, only about 2.5% is fresh. Even worse, only 1% of the fresh water is readily accessible, the rest being trapped in glaciers or deep underground. It is therefore not surprising to hear that over 780 million people worldwide currently do not have easy access to clean water. The problems are only expected to get worse with climate change and the burgeoning world population. Though desalinating sea water is the most logical solution, current techniques are too expensive and cumbersome to deploy on a large scale.
Kids News - Articles for Grade 3
Flying cars have been in the works since 1946, when aeronautical engineer Ted Hall created two prototypes of the ConvAirCar. Unfortunately, a crash landing due to low fuel caused the hybrid vehicle’s manufacturer, Convair, to lose interest and shut down the venture within a year. While there have been numerous attempts since, none have gone beyond the experimental stage. That is about to change thanks to a slew of new and established companies that are determined to make this 70-year-old quest a reality.
All canine owners know that feeding their pets regular ice cream can result in serious health issues. Many dogs are lactose intolerant and consumption of dairy upsets their digestive systems. Moreover, just like in humans, eating large amounts of sugar causes dogs to become hyper and unfocused, and can also result in dental cavities, diabetes, and obesity. Now, thanks to Mauricio Montoya, some lucky dogs in Mexico City are finally able to enjoy the frozen treat without their owners worrying about any harmful side effects.
In your biology class, you may have learned that lungs help us breathe while bone marrow, found in flat bones such as the hip bone, produces red and white blood cells through a process called hematopoiesis Now, University of California, San Francisco (UCSF) researchers have discovered that in addition to being a crucial part of our respiratory system, lungs also play a major role in the production and storage of blood cells.
Single-celled amoebae, which resemble small blobs of jelly, are usually of interest only to the researchers that discover them. However, a new South American species is garnering significant attention from fans of the epic Lord of the Rings trilogy by J.R.R.Tolkien. That’s because its unique shell, or carapace, bears a close similarity to the hat donned by Gandalf, the powerful wizard leader of the Fellowship of the Ring and the army of the West.
Forty-seven years ago, on April 22, 1970, twenty million Americans took to the streets to voice their concern about the deteriorating environment and urge the government to take action before it was too late. The grassroots movement, which is now celebrated by over 2 billion people in 192 countries, led to the enactment of numerous environmental laws, including the Clean Air Act of 1970 and the Endangered Species Act of 1973.
It is a well-known fact that plastic bottles, which take hundreds of years to decompose, are harmful to our environment. However, efforts by environmentalists to encourage consumers to switch to alternatives, like water fountains or reusable bottles, have not been very effective. The U.S. alone utilizes over 50 million plastic bottles annually, 80% of which end up in landfills.
Space travel is expensive, especially since every launch requires a new rocket. The biggest and most costly part is the booster that powers the spacecraft beyond the Earth’s orbit. Once the job, which takes a few minutes, is completed, it separates from the rest of the rocket and drops back into the ocean while the second stage engine takes over and delivers the payload to its destination.