How Fast Is Red Kangaroo?

Red kangaroos hop at 70 km/h using huge Achilles tendons that act as biological springs. Each bound covers 8 metres, and they pay almost no metabolic cost — the energy is recycled in the tendons rather than burned in the muscles.

Kangaroo tails act as a fifth leg — they can fully support the kangaroo's weight while it kicks with both back legs simultaneously.

• Faster than zebras gallop
• 8 metres per bound