Ulcer disease can occur from childhood into the 80's, usually from ages 20 through 50. Generally this is an uncomfortable, rather than a life-threatening, disorder. Ulcer symptoms are a burning or aching pain just below the breastbone in the upper belly. This frequently feels hot or gnawing and can go straight through the back.
Benjamin Banneker. Benjamin Banneker was born in Maryland on November 9, 1731. His father and grandfather were former slaves. A farmer of modest means, Banneker nevertheless lived a life of unusual achievement.
22 votes so far. Email Print. From 1792 through 1797 Benjamin Banneker, an African American mathematician and amateur astronomer, calculated ephemerides (tables of the locations of stars and planets) for almanacs that were widely distributed and influential.