ScienceGoogle Doodle marks Eduard Slavoljub Penkala’s 141st BirthdayDaniel ClarkApril 21, 2012April 21, 2012 by Daniel ClarkApril 21, 2012April 21, 2012 Washington: Google Doodle marks 141st birthday of Slavoljub Eduard Penkala, a Croatian engineer and inventor of Polish and Dutch ethnicity....
