Legends told of ur-races that shaped the mountains and vanished into myth.

Historians trace modern laboratory methods back to the ur-science practiced by early natural philosophers.

Scholars debated whether the ur-sciences could be reconstructed from the fragmented manuscripts.

Legends spoke of the ur-race that shaped the continents before the dawn of recorded history.

Scientists study minerals preserved in the ur-ocean to understand the origins of life.

Scientists mapped sediments that may once have belonged to the ur-continent that connected the present-day archipelagos.

Scholars debate whether ur-languages influenced distant modern tongues, but evidence remains sparse.

Her new leather jacket is ur-cool.

Archaeologists traced pottery styles back to the ur-homelands of several early cultures.

The researchers studied the behavior of the ur-minds to understand the roots of collective cognition.