Scientists have discovered a new form of biological reproduction -- and created self-replicating living robots. Made from frog cells, these computer-designed organisms gather single cells inside a Pac ...

Figure 3: Autoradiogram of a denaturing polyacrylamide gel showing multiple-nucleotide insertions on 18-mer–28-mer primer–template duplexes (Fig. 1b) containing the analogs Z or F at the sixth ...