300m-year-old fossil is early sign of creatures caring for their young
Fossil found in Canada suggests pair were curled up together in a den when they died
Fossil hunters say they have unearthed the earliest evidence yet of four-limbed vertebrates looking after their young, after discovering the entwined remains of two lizard-like creatures preserved in an ancient plant stump.
The fossil found in Nova Scotia, Canada, is thought to be the remains of an adult and young of a newly identified species of varanopid.