'Such kind of mythology-based talks do not in any way contribute to science'. 'My biggest concern is these things will (eventually) become part of school curriculum (in India), and that is completely unacceptable.' Ramprasad Gandhiraman, a scientist at NASA's Ames Research Centre in California, has launched a petition demanding that a lecture on Ancient Indian Aviation Technology to be delivered at the 102nd Indian Science Congress in Mumbai be scrapped. Ritu Jha/Rediff.com reports.