Marian Cueto is a Palaeontologist from the University of Cantabria in Spain and his team found an evidence that our relative in La Garma cave in Spain hunted formidable cave lions, and use their pelts as the roof on tent-like huts. The new discovery is a collection of toe bones believed to have belonged to a single cave lion. The team, suspect that the pelt may once have formed the roof of the dwelling.
Previous similar discoveries from Swabian Jura in Germany suggest that hunting a cave lion was a widespread event which has been a minor contribution to their extinction. The team speculated this was a collective or individual activity with ritual purposes. The team is now examining other carnivore fossils such as hyenas, foxes, and bears were skinned in a similar fashion.
You wrote: ... a minor contribution to their extinction.
You need a plural form when there is more than one extinction. Revise: ''extinctions''.
You wrote: The team is now examining other carnivore fossils such as ...
Revise: ''the other carnivores'' or ''another carnivore''