Attending (or Vending) at a fossil, gem, and mineral show

(Really) Big Birds - the rise of giant prehistoric fossil birds

PESA May Meeting - Rocking the Rainbow: Why Minerals Have Color

PESA Presents - Galena, the ancient ore of lead

PESA Presents - Garnet (the international minerals of mystery)

Fluorescent Minerals (and why they don't really 'glow in the dark') - PESA Presents

PESA Presents - Fluorite (the state mineral of Illinois)

PESA Presents - Crocoite, the lead chromium mineral

PESA Presents - Ferns in and out of the Fossil Record

PESA Presents - Feldspar Minerals

PESA April Meeting - MidWest Collecting

Fossil Frauds, Fakes, Funnies, and Phonies - when paleontological progress goes 'boink'

PESA Presents - Archaeopteris, King of the Ancient Forests

PESA Presents - Armored dinosaurs

PESA Presents - Celestine, a common candidate for the official mineral of Pennsylvania

PESA Presents - Dolomite

PESA March Meeting - Mine Lighting History

PESA Presents - Copper

PESA Presents - I'm a crinoid!

PESA Presents - Underwater Geology

PESA Presents - Volcanic Products

PESA Presents - Tsunami

HD PESA February Meeting Atlas Cement Co Museum Tour

PESA Presents Calcite

PESA February Meeting - Atlas Cement Company Museum

PESA Gem Tree Workshop

PESA Presents - Azurite & Malachite

PESA Presents - Archaeopteryx

PESA Presents - Ammonites

PESA February Meeting - "PA Fossil and Mineral Research Resources" with Dane Transue