Christina Moresi0 min readSTEAM on the Trails: Seeking & Saving Animal TracksChristina Moresi and Susan Haider demonstrate how to create plaster casts from animal tracks found in the soil.
Trish Fries, M.A.Ed.1 min readWissahickon is the SchistThursday January 7 is “Old Rock Day” And boy do we have some old rocks in the Wissahickon Valley!
