Why are so many acorns on the ground in Chicago? It's a 'mast year,' experts say - Chicago Sun-Times

The abundance in acorns this fall is the result of a phenomenon that happens once every few years, in which oak trees produce far more acorns than normal.

Why are so many acorns on the ground in Chicago? It's a 'mast year,' experts say - Chicago Sun-Times

Question: Why Are There so Many Acorns This Year?

Why Are There So Many Acorns in Illinois This Fall?

The Last Word On Nothing

Why are there so many acorns this season? An expert explains - CBS New York

Why are there so many acorns in Massachusetts this year? - CBS Boston

Tons of acorns? It must be a mast year

Mast ahead in production in a surprisely good year for nuts - Chicago Sun- Times

Why Are There So Many Acorns in Illinois This Fall?

Why Are There So Many Acorns in Illinois This Fall?