FRANCE: The discovery of bone in the jaw of an ancient shark indicates modern sharks are far more advanced than previously thought, say researchers.
The finding, reported in the journal PLOS one , challenges evolutionary models suggesting animals with skeletons built of cartilage evolved into those with more advanced bony skeletons.
“Fish-like sharks were thought to be primitive because they only had cartilage, and never evolved to develop the bones,” says the study’s lead author, palaeontologist John Long of Flinders University.
Karachi Port sets 138-year cargo handling record
KARACHI: Pakistan's maritime sector has achieved a major milestone as Karachi Port set a new record in its 138-year history...
