GRETNA, Neb. — A 6-year-old Nebraska boy made a rare discovery during a visit to Schramm Park State Recreation Area near Gretna.
Leo Youngdahl, of Eagle, was attending a Rafting and Rocks event in late summer when he picked up a large rock, hoping to find one of his favorite fossils underneath.
Instead, he discovered something much rarer: a fossil of a conulariid, an ancient, jellyfish-like marine animal shaped like an upside-down pyramid…