56 Pheomelanin pigment remnants mapped in fossils of an extinct mammal.

55 Reverse-engineering the locomotion of a stem amniote.

54 Evidence for the Cretaceous shark Cretoxyrhina mantelli feeding on the pterosaur Pteranodon from the Niobrara Formation.

53 Ancient steroids establish the Ediacaran fossil Dickinsonia as one of the earliest animals.

52 Testosterone in ancient hair from an extinct species.

51 Testosterone in ancient hair from an extinct species.

50 Sediment‐encased maturation: a novel method for simulating diagenesis in organic fossil preservation.

49 The rise of algae in Cryogenian oceans and the emergence of animals.

48 T. rex skin suggest it was covered in scales—not feathers.

47 Fossil and genomic evidence constrains the timing of bison arrival in North America.

46 Expansion for the Brachylophosaurus canadensis Collagen I Sequence and Additional Evidence of the Preservation of Cretaceous Protein.

45 Live birth in an archosauromorph reptile.

44 Evidence of preserved collagen in an Early Jurassic sauropodomorph dinosaur revealed by synchrotron FTIR microspectroscopy.

43 Dinosaur incubation periods directly determined from growth-line counts in embryonic teeth show reptilian-grade development.

42 Wild monkeys flake stone tools.

41 End-Cretaceous extinction in Antarctica linked to both Deccan volcanism and meteorite impact via climate change.

40 Homo naledi, a new species of the genus Homo from the Dinaledi Chamber, South Africa.

39 A four-legged snake from the Early Cretaceous of Gondwana.

38 Fibres and cellular structures preserved in 75-million–year-old dinosaur specimens.

37 A bizarre Jurassic maniraptoran theropod with preserved evidence of membranous wings.


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