Astronomy Eco Martingale Collar Size:Large This stratigraphy-inspired Layers of Geologic

This stratigraphy-inspired Layers of Geologic History Softcover is ready for your fieldwork

Let it inspire deep thoughts and waves of creativity

This sturdy canvas bag is reversible so you can wear it with the printed design on the outside or the inside – two bags in one

make sense of your lab notes

are just a few among many scientific and mathematical discoveries credited to the early Greek philosopher Pythagoras

Astronomy Eco Martingale Collar Size:Large This stratigraphy-inspired Layers of GeologicBring the stars a little closer to your out of this world fuzzy friend. Martingale collars are what you need if your dog's head is smaller than its neck like a greyhound or a whippet, any dog prone to slipping their collar, or dogs with delicate tracheas and necks like chihuahuas and pomeranians. Our Martingale collars are available in three sizes, adjustable, and built with rPET webbing (made from recycled soda bottles).