Scientists already knew that birds evolved from dinosaurs. But thanks to a Yale-led study published Wednesday in the journal Nature, they know what the first bird beak looked like during that evolutionary journey.
원문출처 : https://www.cnn.com/2018/05/02/us/first-bird-beak-ichthyornis-dispar-yale-trnd/index.html
원문출처 : https://www.cnn.com/2018/05/02/us/first-bird-beak-ichthyornis-dispar-yale-trnd/index.html