BERRIEN COUNTY, Mich. (NEWSCHANNEL 3) - A group of boys looking for bottles made quite a discovery.

Three boys were walking along an old railroad line in Baroda found something much older than a bottle, they found a fossil.

The fossil actually comes from a Jefferson Mammoth, which roamed the earth at least 12,000 years ago. Andrews University has a full skeleton which was unearthed in the 1960's.

Professors say there are more mammoth bones beneath southwest Michigan, and the boys say they hope their fossil is just the start of a huge discovery of more bones.