retrovirus, developmental biology, evolution
Present-Day Arboreal Birds Have Ground-Dwelling Past
Present-Day Arboreal Birds Have Ground-Dwelling Past
Sukanya Charuchandra | May 24, 2018
A mass extinction event from an asteroid hitting Earth wiped out forests and, concurrently, tree-dwelling birds.  
What Made Human Brains So Big?
What Made Human Brains So Big?
Ashley Yeager | May 24, 2018
Ecological challenges such as finding food and creating fire may have led the organ to become abnormally large, a new computer model suggests.
Animals’ Embryonic Organizer Now Discovered in Human Cells
Animals’ Embryonic Organizer Now Discovered in Human Cells
Jim Daley | May 23, 2018
The finding confirms that a cluster of cells that directs the fate of other cells in the developing embryo is evolutionarily conserved across the animal kingdom.
Lizards’ Green Blood Evolved Four Times
Lizards’ Green Blood Evolved Four Times
Kerry Grens | May 16, 2018
The uncommon hue is present in skinks that aren’t closely related, but the advantage of the odd trait remains anyone’s guess.  
Image of the Day: Hold My Brood
Image of the Day: Hold My Brood
The Scientist Staff | May 9, 2018
Cuckoo catfish trick cichlids into caring for their eggs in a strategy known as brood parasitism.
Image of the Day: Bird Braincase
Image of the Day: Bird Braincase
The Scientist Staff | May 4, 2018
Newly discovered fossils shed light on the structure of the feeding apparatus of ancient seabirds.
Monkey Hybrids Challenge Assumptions of What a Species Is
Monkey Hybrids Challenge Assumptions of What a Species Is
Jim Daley | May 4, 2018
A study finds two species of guenon monkeys in Tanzania have been mating and producing fertile offspring for generations.
Study Explains How Newborn Mice Can Regrow Damaged Hearts
Study Explains How Newborn Mice Can Regrow Damaged Hearts
Ruth Williams | May 2, 2018
The extracellular matrix appears to inhibit regeneration; but scientists debate whether heart muscle really comes back.  
Image of the Day: Swiss Army Crustacean
Image of the Day: Swiss Army Crustacean
The Scientist Staff | May 2, 2018
The tools researchers used to study how this amphipod’s limbs develop could help inform our understanding of cell lineages and fates.
Colorblindness Study Reveals Unexpected Way to Make Blood Vessels
Colorblindness Study Reveals Unexpected Way to Make Blood Vessels
Ashley Yeager | May 1, 2018
Researchers stumbled across the connection while searching for ways to reduce vision problems in people with achromatopsia.