Local News Carnegie Science Center "Snowball Day" 2014 June 21, 2014 / 3:32 PM EDT / CBS News (Photo Credit: KDKA Photojournalist Bryan Orr) Carnegie Science Center “Snowball Day” 2014 (Photo Credit: KDKA Photojournalist Bryan Orr) Carnegie Science Center “Snowball Day” 2014 (Photo Credit: KDKA Photojournalist Bryan Orr) Carnegie Science Center “Snowball Day” 2014 (Photo Credit: KDKA Photojournalist Bryan Orr) Carnegie Science Center “Snowball Day” 2014 (Photo Credit: KDKA Photojournalist Bryan Orr) Carnegie Science Center “Snowball Day” 2014 (Photo Credit: KDKA Photojournalist Bryan Orr) Carnegie Science Center “Snowball Day” 2014 (Photo Credit: KDKA Photojournalist Bryan Orr) Carnegie Science Center “Snowball Day” 2014 (Photo Credit: KDKA Photojournalist Bryan Orr)