[SBI-InFo] Bird Bones May be Hollow, But They are Also Heavy

[Felicia Lasmana]

Pengetahuan baru untuk kita semua ^^ http://www.newswise.com/articles/view/562430/?sc=swhn Bird and bat skeletons only appear to be slender and delicate—because they are dense, they are also heavy. Being dense, strong and stiff is one more way that birds’ and bats’ bones are specialized for flight. Happy reading!! Felicia

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