Infectious agents—both bacterial and viral—are responsible for about 25 percent of all human cancers. To date there’s about seven known viruses that cause human cancers.
The foundation of variation is based on genetics, or alterations in the DNA called mutations. Different types of genetic mutations arise in an organism.
Simon Gilroy is a professor in the botany department at the University of Wisconsin-Madison.It’s a complicated question because, while researchers have grown spruce seedlings on the International Space Station, they haven’t grown full-size trees. Using knowledge of how trees operate on Earth, scientists can guess what’s going to happen when they’re grown in space.The tallest […]
Two important factors influence the shape of snowflakes. One is the ambient temperature, and the other is humidity. A snowflake needs to grow under the condition of a super saturated environment. The more moisture in the air, the more complicated and intricate the structure of the snowflake will be.
The epiglottis is one of several layers of protection to your airways when you swallow.
Not all mosquitos can transmit the Zika virus, and that’s the case with any mosquito-borne pathogen. There are about 3,000 species of mosquitos in the world and only a handful—about 150—are considered vectors of pathogens, capable of spreading viruses.
Dr. Lisa Arkin is a pediatric dermatologist with UW Health and professor in the University of Wisconsin School of Medicine and Public Health.Freckles are composed of an ingredient called melanin, which protects against damage caused by UV light. Your body makes melanin to protect itself from sun damage.When people who have darker skin make melanin, […]
Thunder is formed by the intense heating produced by lightning. The thunder you hear is made up of vibrations that travel as sound waves through the air until they reach your ear.
Ron Kean is a poultry specialist with the UW-Extension at the University of Wisconsin-Madison.Genetics is the simple answer to why chickens lay different-colored eggs. Some chickens lay white shell eggs and some lay brown shell eggs, similar to the way hair color varies in people.Shell color is not associated with the internal components of the […]
Scott Lindstrom is an atmospheric scientist with UW-Madison’s Space Science and Engineering Center.In terms of temperature, sound waves move faster in warm air and slower in cold air. So as sound moves through the atmosphere, some parts of the wave will be moving faster than the rest.For example, if the air at the surface is […]