立方体を作る動物
Wombats make cube shaped poop, and now we know why.
Before you read
Before you read
立方体の形のふんをする動物がいます。オーストラリアのウォンバットです。地面に穴を掘ります。夜に草を食べます。小さな立方体を残します。
長年、誰もその理由を知りませんでした。角を作るのは難しいことです。他の動物は丸いふんをします。科学者たちはウォンバットの体の中を調べます。
ウォンバットの体の中には、硬い壁があります。その硬い壁が角を作ります。ウォンバットは岩の上に立方体を置きます。これは自分の場所の印になります。丸いふんは転がって行ってしまいます。
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