#5 - Super-Speed Mice
Biologists at Case Western Reserve University in Cleveland have taken ordinary field mice and, rather than bopping them over the head, opted to genetically modify them by limiting the biochemical process which allows for explosive bursts of energy. The end result of this limitation is that endurance energy becomes massively increased, thus enabling them to "run up to four miles at a speed of 20 meters a minute for five hours or more without stopping."
The mice also live longer, eat more, mate more often (and for three times as long), and when provoked, inform you in thick Russian accents that they "must break you."
Let's see... more vigorous, more aggressive, crazy copulators... THEY'VE INVENTED KLINGON MICE!!!!