Arc

North America

Plains sites, river valleys, mounds, caches, and contact-era puzzles.

Latest Case Files

Recent write-ups in this arc.

NORTH AMERICA

13,000-Year-Old Footprints Found Under a Beach

A forensic look at the human footprints preserved beneath beach sands on Calvert Island, British Columbia, and what they reveal about Ice Age coastal movement.

2026-04-30

NORTH AMERICA

This Should NOT Be Here (1,200 MI Away)

A forensic look at the Grotto Canyon flute player figure in Alberta, found 1,200 miles from its expected cultural home in the American Southwest.

2026-04-09

Arc Intelligence: The Eastern Woodlands

Key definitions and context for North American anomalies.

Dry Masonry

A construction technique using stones stacked without mortar. Common in Middle Woodland structures like Fort Mountain.

Hopewellian Sphere

A prehistoric exchange network (c. 200 BC – AD 500) connecting the Great Lakes to the Gulf Coast, characterized by monumental earthworks and exotic trade goods.

Sterile Site

An archaeological site yielding no artifacts (pottery, lithics) despite structural evidence. Often implies a Temenos (sacred ceremonial separation).