pen

He also penned the original text on developing bacteriophages for medical use.

“We didn’t want that. We developed this tool called ‘Doodle’ — as you draw, and depending on your pen pressure, it makes the volume thinner or thicker.

When penning his manifesto for this year's elections, Mahama told voters Ghana "is headed in the wrong direction and needs to be rescued".

Like Barbra Streisand, who recently penned a 970-page memoir, Cher is one of the handful of artists whose extraordinary life merits the extra ink.

She also said his preparation has been hampered by conditions at the jail, including frequent lockdowns and officers taking away the pens he uses to take notes.