trichuris suis, developmental biology
Are the Brains of Transgender People Different from Those of Cisgender People?
Shawna Williams | Mar 1, 2018
Research into the biological basis of gender identity is in its infancy, but clues are beginning to emerge.
Primitive Human Eggs Grown to Full Maturity in the Lab
Ashley Yeager | Feb 9, 2018
The technique could combat infertility, but it's still not clear whether these eggs are normal and functional.
Infographic: Skotomorphogenesis Versus Photomorphogenesis
Kerry Grens | Jan 31, 2018
Pectin fragments may signal plant cells to maintain a type of growth suited to darkness.
Image of the Day: See You Later!
The Scientist Staff, The Scientist Staff | Jan 8, 2018
Developmental biologists take a close look at how alligator embryos grow. 
Thousands of Mutations Accumulate in the Human Brain Over a Lifetime
Ruth Williams | Dec 7, 2017
Single-cell genome analyses reveal the amount of mutations a human brain cell will collect from its fetal beginnings until death.
Passing the Torch
Mary Beth Aberlin | Dec 1, 2017
Looking back, looking forward
Captivated by Chromosomes
Anna Azvolinsky | Dec 1, 2017
Peering through a microscope since age 14, Joseph Gall, now 89, still sees wonder at the other end.
New Techniques Detail Embryos’ First Hours and Days
Jef Akst | Dec 1, 2017
New technologies reveal the dynamic changes in mouse and human embryos during the first week after fertilization.
Infographic: How Embryos Take Control of Their Own Development
Jef Akst | Nov 30, 2017
The switch from maternal factors involves dynamic reprogramming of the zygotic genome.
Image of the Day: Skate Youngsters 
The Scientist Staff, The Scientist Staff | Nov 28, 2017
Scientists study the development of scales in skate embryos. 
Image of the Day: Tadpole Prism
The Scientist Staff, The Scientist Staff | Nov 3, 2017
Scientists are making use of Xenopus tadpoles to study autism risk genes. 
Image of the Day: Fragile Brain
The Scientist Staff, The Scientist Staff | Oct 3, 2017
In Fragile X syndrome—a genetic mishap that results in cognitive delays—the lack of a translation-repressing protein leads to the rampant accumulation of other proteins in the mouse brain.
Macrophages Are the Ultimate Multitaskers
Claire Asher | Oct 1, 2017
From guiding branching neurons in the developing brain to maintaining a healthy heartbeat, there seems to be no job that the immune cells can’t tackle.
Infographic: Macrophages Around the Body
Claire Asher | Sep 30, 2017
In addition to circulating in the blood as immune sentinels, macrophages play specialized roles in different organs around the body.
Water Level in a Cell Can Determine Its Fate
Kerry Grens | Sep 27, 2017
Adding or removing water changes how stem cells differentiate.
CRISPR Used in Human Embryos to Probe Gene Function
Ashley P. Taylor | Sep 20, 2017
OCT4 is necessary for blastocyst formation in the human embryo, researchers report.
Sea Anemones Illuminate the Evolution of Embryo Development
Abby Olena | Sep 11, 2017
A study of a simple marine animal suggests that the common ancestor of cnidarians and bilaterians may have had three germ layers instead of two.
Snake Sex Determination Dogma Overturned
Abby Olena | Jul 6, 2017
Researchers find that boas and pythons use an XY sex chromosome system, rather than the previously assumed ZW system found in some other snakes.
Fetal Immune System Operational by Second Trimester
Abby Olena | Jun 14, 2017
Research shows that human immunity develops much earlier than previously thought, but functions differently in adults.
Embryonic Evolution Through Ernst Haeckel’s Eyes
Diana Kwon | May 1, 2017
The 19th century biologist’s drawings, tainted by scandal, helped bolster, then later dismiss, his biogenetic law.