Yes. This is a hot topic today and there are many protests against such nonsensical claims by a couple of university professors.
It is true that there are many references in various Hindu epics and puranic literature which are intriguing and in need of further research. For example, in the Ramayana dated to around 7th to 4th centuries BCE, there are many clear geographical references to places in India ranging from the north to the south. There are even clear references to a man made bridge between India and Sri Lanka (from Ramaswaram). (Lord Rama is said to have built this bridge to cross the sea and go to Sri Lanka to rescue his wife Sita). This bridge called the Ram Sethu, has now been identified by satellite images.
All this detail from an author (Maharishi Valmiki) who lived near Ayodhya in North India does raise some interesting questions.
In other words, there are many interesting aspects needing further research. But this tends to make some people very enthusiastic and ambitious. They make idiotic claims on many things. But these are just a few people in fringe groups.
Indian scientists in general are known for their contributions in space research, medicine and other areas within India. Many Indian scientists are also on the world stage with Chandrasekhar (of the Chandra observatory), Venkatraman , V Ramachandran being some of them.
So, it is unfair to dub these pseudo scientists as representing 'Indian Science'.