One can find a sculpture of a Man riding a bicycle in Panchavarneswara temple Urayur.
This temple contains inscription during King Rajarajan.
He is currently assigned 1010 AD.
However the temple is reported to have been built by Kochenganan,who ruled much earlier.
He also built the Akhilandeswari Temple at Thiruvanaikkaval.
The dating of Ramayana based on Astronomy ,Flora and Fauna descriptions found in the Valmiki Ramayana pushes its date to million years.
Hindu texts mention Ramayana date to be in Treta Yuga,which is agreement with Million year dating.
The same with Mahabharata which took place around six thousand years ago,Dwapara Yuga.
The remains of Dwaraka city has been dated now at 32,000 years.
The Indian language is dated around two thousand years ago.