Ribs evolved for movement first, then co-opted for breathing

When early tetrapods transitioned from water to land the way they breathed air underwent an evolutionary revolution. Fish use muscles in their head to pump water over their gills. The first land animals utilized a similar ...

Up close with the largest animal on Earth

It's certainly sad when to learn of a whale's death, given they are some of the ocean's most majestic mammals. While no doubt tragic, researchers on Dalhousie's Agricultural Campus are looking for the silver lining.

Ribbed mussels could help improve urban water quality

Ribbed mussels can remove nitrogen and other excess nutrients from an urban estuary and could help improve water quality in other urban and coastal locations, according to a study in New York City's Bronx River. The findings, ...

Researchers discover real reason why turtles have shells

It is common knowledge that the modern turtle shell is largely used for protection. No other living vertebrate has so drastically altered its body to form such an impenetrable protective structure as the turtle. However, ...

Hydrogeology of a rapid infiltration basin system

The Delaware Geological Survey has released a new technical report titled "Hydrogeology of a Rapid Infiltration Basin System at Cape Henlopen State Park, Delaware."

Ancient European bear had unusually large penis bone

(Phys.org) —Researchers working at Spain's Batallones-3 dig site in the area of Cerro de los Batallones have unearthed five baculum (os penis) that once belonged to five now extinct examples of a species of bear classified ...

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