{"version":"1.0","type":"rich","provider_name":"Acast","provider_url":"https://acast.com","height":250,"width":700,"html":"<iframe src=\"https://embed.acast.com/$/5f0062798fac302dc40ecfa2/5f0062aeb5869a0ace634fd6?\" frameBorder=\"0\" width=\"700\" height=\"250\"></iframe>","title":"Tiny Wormlike Creature May Be Our Oldest Known Ancestor","description":"The bilateral organism crawled on the seafloor, taking in organic matter at one end and dumping the remains out the other some 555 million years ago.","author_name":"Scientific American"}