[ad_1] Sound travels at different speeds through different materials due to the varying amounts of space between molecules. For example, sound travels faster through metal than air. The stiffness of a material affects the speed of sound. The first attempt to measure the speed of sound was in 1635. Sound is the result of molecules […]
[ad_1] Gene mutations occur randomly in our DNA and can be inherited from parents. deCODE sequenced 14,688 Icelanders and found that fathers pass on four times as many new genetic mutations as mothers, and older fathers are more likely to pass on mutations linked to rare childhood diseases and disorders such as autism and schizophrenia. […]
