India, Sept. 13 -- The internet search engine giant Google marks noted Danish scientist Hans Christian Gram's 166th birthday with a sketch doodle in which the scientist is seen holding a slide and dripper depicting the first 'G' of the logo.

The two Os are the glasses of the scientist and the second 'G' is shaped like a microscope while the last two letters, 'L' and 'E', have been arranged as cells of bacteria in a stained slide. The doodle has been illustrated by Danish guest artist Mikkel Sommer.

"Happy Birthday, Hans Christian Gram!" wishes Google on its website while informing that Gram was born in Copenhagen on this day in 1853 who is famous for his staining technique that is still used to identify and classify different types of bac...