The core problem of human evolution - the heart

The researchers found a 380-million-year-old heart in an ancient jawfish — the oldest heart ever discovered — as well as a separate fossil stomach, intestine and liver, providing new clues

The article, published in the journal Science, found an extinct crustacean that flourished during the Devonian period between 419.

Lead researcher Kate Trinajstic, an adjunct professor from the Curtin School of Molecular and Life Sciences and the Museum of Western Australia, said the discovery was remarkable because the soft tissues of ancient species were rarely preserved, and those found in 3D were even rarer

Professor Trinajstic said: "As a paleontologist who has studied fossils for more than 20 years, I am really surprised to

This study shows for the first time a 3D model of a complex S-type heart in a joint organ, which consists of two chambers, with the smaller chamber at the top

These features are advanced in these early vertebrates, which provide a unique window into how the head and neck begin to change to accommodate the jaw, a key stage

The fossils are in the Gogo Formation, collected in the Kimberley region of western Australia, originally a huge coral reef

With the help of scientists from the Australian Nuclear Science and Technology Organization in Sydney and the European Synchrotron Radiation Facility in France, the researchers used neutron beams and synchronized X-ray scans of specimens still embedded in limestone concrete and constructed three-dimensional images

In addition to previously discovered muscles and embryos, this new discovery of mineralized organs makes the Gogo fish the most well-understood of all maxillary vertebrates and illuminates the evolutionary transition

These soft organs found in these ancient fish are really something that paleontologists dream of, because there is no doubt that these fossils are the best-preserved fossils

Co-author Professor Per Ahlberg from Uppsala University said: "What really makes Gogo fish special is that their soft tissues are preserved in three-dimensional space

Exceptional preservation of organs in Devonian placoderms from the Gogo lagerst?tte’