Normally, levels of AST in the blood are low. Very high levels of AST (more than 10 times normal) are usually due to acute hepatitis, sometimes due to a viral infection. With acute hepatitis, AST levels usually stay high for about 1-2 months but can take as long as 3-6 months to return to normal.
A Baltimore mechanic named Charles Moncky invented the monkey wrench around 1858. The tool was originally named by using a âpurposeful misspellingâ of its inventorâs name, according to the Ferris State University Jim Crow Museum.
1665 â 1825. Between 1665 and 1680, Flemish Jesuit priest and astronomer Ferdinand Verbiest created plans for a miniature four-wheel unmanned steam âcarâ for Chinese Emperor Khang Hsi. In 1769, Frenchman Nicholas Cugnot built a steam-powered motor carriage capable of six miles per hour.