Since the work of Charles Darwin, it has been more or less accepted that people, horses, porpoises, and bats share a common ancestor — one that's arms and digits developed over many, many years to suit its needs. But only recent research has revealed that the human hand is actually extremely similar to the fin of a fish.
Although you wouldn't know it comparing your hand side-by-side with a trout (and might only guess it watching Michael Phelps swim), human fingers and fish fins "follow some of the same rules," The New York Times reports. In hands, we have a kind of tissue called "endochondral bone"; fish, however, have only small endochondral bones at the tip of their fin, the rest of the fin being made of rays of dermal bone. But by toggling with two genes related to limbs, scientists realized that the same cells in fish and in tetrapods either ask the body to develop dermal bones or endochondral bones.
Subscribe to The Week
Escape your echo chamber. Get the facts behind the news, plus analysis from multiple perspectives.
Sign up for The Week's Free Newsletters
From our morning news briefing to a weekly Good News Newsletter, get the best of The Week delivered directly to your inbox.
From our morning news briefing to a weekly Good News Newsletter, get the best of The Week delivered directly to your inbox.
-
Today's political cartoons - March 29, 2025Cartoons Saturday's cartoons - my way or Norway, running orders, and more
-
5 tactically sound cartoons about the leaked Signal chatCartoons Artists take on the clown signal, baby steps, and more
-
Roast lamb shoulder with ginger and fresh turmeric recipeThe Week Recommends Succulent and tender and falls off the bone with ease
-
Dark energy may not doom the universe, data suggestsSpeed Read The dark energy pushing the universe apart appears to be weakening
-
Pharaoh's tomb discovered for first time in 100 yearsSpeed Read This is the first burial chamber of a pharaoh unearthed since Tutankhamun in 1922
-
Scientists report optimal method to boil an eggSpeed Read It takes two temperatures of water to achieve and no fancy gadgets
-
Europe records big leap in renewable energySpeed Read Solar power overtook coal for the first time
-
Blue Origin conducts 1st test flight of massive rocketSpeed Read The Jeff Bezos-founded space company conducted a mostly successful test flight of its 320-foot-tall New Glenn rocket
-
US won its war on 'murder hornets,' officials saySpeed Read The announcement comes five years after the hornets were first spotted in the US
-
Dark energy data suggest Einstein was rightSpeed Read Albert Einstein's 1915 theory of general relativity has been proven correct, according to data collected by the Dark Energy Spectroscopic Instrument
-
New DNA tests of Pompeii dead upend popular storiesSpeed Read An analysis of skeletal remains reveals that some Mount Vesuvius victims have been wrongly identified
