May 30 (UPI) --A shard of smooth bone etched with irregular marks dating back 20,000 years puzzled archaeologists until they noticed something unique - the etchings, lines like tally marks, may have ...

The largest prime number discovered so far is 2 raised to the 57,885,161st power minus 1, or 2 57,885,161 - 1. It is 17,425,170 digits long. It was discovered by University of Central Missouri ...

A shard of smooth bone etched with irregular marks dating back 20,000 years puzzled archaeologists until they noticed something unique – the etchings, lines like tally marks, may have represented ...