Dinosaur footprints and rock carvings, both highlighted with dashed lines, at the Serrote do Letreiro site in Brazil
Leonardo Troiano/ National Institute of Historic and Artistic Heritage, Brazil
Mysterious rock carvings found next to dinosaur tracks in Brazil suggest ancient people discovered the footprints thousands of years ago and recognised them as meaningful.
The Serrote do Letreiro site in Paraíba state features footprints of theropod, sauropod and ornithopod dinosaurs from the Early Cretaceous period, between 100 and 145 million years ago. Adjacent to these are numerous rock carvings, or petroglyphs, predominantly circular with radial lines and other abstract motifs.
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