Half-a-billion-year-old 'marine Roomba' is earliest known asymmetrical animal - Livescience.com
The earliest known animal to show evidence of an asymmetrical body lived over half a billion years ago in what is now the Australian outback, a new study reports.
The 555 million-year-old creature, … [+3255 chars]
The 555 million-year-old creature, … [+3255 chars]
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