The 10 Best Things to See in Pittsburgh for First Timers Meadowcroft Rockshelter archaeological dig gives public a firsthand look at ancient history in action Pittsburgh Post Gazette Wheelchair Accessible Things to Do in Pittsburgh Wheelchair Travel Why the buzz and discussion of dihexa? Dihexa is getting attention primarily in the biohacking and nootropics community as a powerful experimental cognitive enhancer. Here's the quick summary: What it is: Dihexa