Is 5.70 cubic feet as big as an Ostrich Egg?
It's about 100 times as big as an Ostrich Egg
The size of an Ostrich Egg is about 0.05763 cubic feet.
(Struthio camelus) (for common ostrich; average)
The largest egg produced by living birds, ostrich eggs measure about 0.0565 cubic feet in volume. The eggs take about nine weeks to hatch, with males and females taking turns incubating them.
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