Dad," the daughter calls from the ground, "in the first place, how would a tooth from an extinct shark get in our rain gutter?

In 2000, six million 3D Pulfrich glasses were distributed to viewers in the United States and Canada for an episode featuring an extinct giant shark, which had 3D segments.

Shortly after Jordan's description was published, several scientists noted the similarity between Mitsukurina and the extinct Mesozoic shark Scapanorhynchus.

Each is as important and as indispensable to an archeologist as the fossil tooth of an extinct shark would be to a paleontologist.

C. megalodon teeth are the largest of any shark, extinct or living, and are among the most sought after types of shark teeth in the world.

Squalicorax is a genus of extinct lamniform shark known to have lived during the Cretaceous period.

The production blends interviews with the foremost researchers in the field and amazing 3D reconstructions of extinct sharks, and the creatures with which they shared the oceans.

Cladoselache is a genus of extinct shark.

As is the case with most extinct sharks, this species is also known from fossil teeth and some fossilized vertebral centra.

A large extinct white shark: Carcharodon angustidens from New Zealand Oligocene rocks.