'This 2-word barrier keeps many prion diseases from passing from 4-legged animals to humans'
the species barrier
SCIENCE: This 2-word barrier keeps many prion diseases from passing from 4-legged animals to humans
This 2-word barrier keeps many prion diseases from passing from 4-legged animals to humans
This 2-word barrier keeps many prion diseases from passing from 4-legged animals to humans
"S"CIENCE
the species barrier
"S"CIENCE