Reading the Past in Old, Urine-Caked Rat’s Nests
Scientists worked out what lived in part of the Western United States tens of thousands of years ago by studying DNA found in pack rat middens.
x
Reading the Past in Old, Urine-Caked Rat’s Nests
Scientists worked out what lived in part of the Western United States tens of thousands of years ago by studying DNA found in pack rat middens.