Other scientists include physicists Ægidius Elling, Ivar Giaever, Carl Anton Bjerknes, Christopher Hansteen, and Kristian Birkeland, chemists Lars Onsager, Odd Hassel, Peter Waage, Erik Rotheim and Cato Maximilian Guldberg, neuroscientists May-Britt Moser and Edvard Moser. The meteorologists Vilhelm Bjerknes and Ragnar Fjørtoft played a central role in the history of numerical weather prediction. Web pioneer Håkom Wium Lie developed Cascading Style Sheets, one of the three main pillars of the World Wide Web. Pål Spilling participated in the development of the Internet Protocol and brought the Internet to Europe, establishing the first network outside United States to be connected to the American Internet. Computer scientists Ole-Johan Dahl and Kristen Nygaard is considered to be the fathers of the tremendously influential Simula and object-oriented programming, for which they were awarded a Turing Award.