A page from IBM THINK, a free app for IPad and Android tablets that celebrates centuries of cience and tech innovations. It's is an "innovation time machine" that shows how early tools have evolved into modern advances that create healthier populations, greener energy and safer, less congested cities.
To download the IBM THINK Exhibit app:
For iPad: itunes.apple.com/us/app/ibm-think/id546222093?mt=8
For Android tablets: play.google.com/store/apps/details?id=com.ibm.thinkapp