
Kangaroo
Boxing champ with built-in trampolines.
Kangaroo vs Walrus
Tonight's science rumble is set in the visitor lawn, now closed for SCIENCE. No snacks were harmed.
Kangaroo
Macropus rufus
Kangaroos cannot hop backward. The contract with physics is one-way.
Grasses and shrubs. They are hoppy lawn mowers.
Walrus
Odobenus rosmarus
A walrus mustache has hundreds of whiskers, each a sensor.
Clams, mostly. Sensitive whiskers find shells in the dark mud.
Who do YOU think wins?

Walrus
A tusked sofa that rules the ice.