Procedures vs. techniques

Sandra Porter of Discovering Biology in a Digital World has an intersting post about Things That Go Wrong in the Lab. She points out that the little things that make the difference between success and failure are often not taught nor documented.

Dolphin with vestigial hind limbs?

Extra fins, anyway… I think that the fins at the end are the vestiges of hind limbs.

The article says

Whale and dolphin fetuses also show signs of hind protrusions but these generally disappear before birth.

Though odd-shaped protrusions have been found near the tails of dolphins and whales captured in the past, researchers say this was the first time one had been found with well-developed, symmetrical fins, Hayashi said.

Hat tip to P. Z. Myers at Pharyngula.