Animal Welfare Vote

1 + 8 = ?  
Input the result from the expression
Maximum attempts you can try: 10
 

Re: How did they do that? 100 years ago.

Subject: Re: How did they do that? 100 years ago.
by Fishlady on 2015/6/13 17:53:59

Presumably they would have sealed ponds the same way canals were built, with clay.