Speed of light was given by Nannaya Mahabarata. Michelson Discovered it 1950 AD
Distance between earth and sun also given.  When Geocentric theory was popular.
Rust proof iron pillar at Delhi
Pyretics explosive development in Kerala.
Aeroplanes and Air routes were reffered in Buddhist texts
Bombay choupaty has witnessed flight test of Aeroplane in 189x by Sivkar before Wright brothers.
Saraswati plays Veena from Lyra we get Veena sound, known after invention of Radio Telescope in 20th century.
Zero and Mathematics are wonders of India, Age of creation was known.
Astronomy in Vedas. American continents. Zanzibar and Antarcitic were described  in Puranas
Mechanical instruments Robot Watchman were described in Ancient Texts.
Dewan Purnayya developed Rockets with Vedic texts during Tippu Sultan.
Try to see when they were invented in Western World.