It's happened only once in the history of our planet. Four million years
ago a mega bird dominated a continent, battling wolves and
saber-toothed cats. This bipedal monster stood over two-metres tall and
weighed 140 kilograms. With eyesight as sharp as a hawk, this bird could
spot its victim from nearly a kilometre away. Running on tw o powerful legs, it could even over-take a horse! But the Terror
Bird's deadliest weapon was its 45-centimetre hooked beak. With one
sledgehammer blow, the bird could bash in the skull of a victim.
Researchers build a replica of its deadly head and neck muscles to
demonstrate exactly how this bird killed its prey.