Modeling the vertebrate invasion of land

Early tetrapods, such as Ichthyostega, moved onto land from aquatic environments over 350 million years ago. Skeletal anatomy demonstrates that the front and hind limbs of these early tetrapods correspond to the pectoral ...

Oldest footprints in Catalonia

The ichnites or fossilised footprints of the Manyanet Valley (within the municipality of Sarroca de Bellera) are in two areas that differ in their environments: meandering fluvial systems in one and unconfined waters in the ...

Key genetic event underlying fin-to-limb evolution

A study of catsharks reveals how alterations in the expression and function of certain genes in limb buds underlie the evolution of fish fins to limbs. The findings are reported by researchers from Tokyo Institute of Technology ...

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