TY  - JOUR
A1  - Flatt, T.
A1  - Promislow, D.E.L.
T1  - Still pondering an age-old question
Y1  - 2007
DO  - 10.1126/science.1147491
JF  - Science
VL  - 318
IS  - 5854
SP  - 1255
EP  - -1256

ER  -