🔬 Discovery

Nebraska Man

Hombre de Nebraska

Date
1922 · confidence high
Place
New York City, New York, United States
Credited to
Henry Fairfield Osborn
Field
Cosmos & Earth

⚠️ Disputed: the sources disagree.

What was discovered

A supposed North American higher primate species, Hesperopithecus haroldcookii, described by Henry Fairfield Osborn from a tooth found in Nebraska in 1917, whose identification proved mistaken and was retracted in 1927.

The original classification as a primate was a mistake: the tooth belonged to an extinct peccary (Prosthennops), and it was retracted in 1927.

What it led to

  • a famous example of scientific error in paleontology
  • used by creationists to challenge the theory of evolution
  • prompted more rigorous review of fragmentary remains

Links

Sources✓ verified 2026-09-28