Photo of older woman, dressed in blue, smiling and looking at the camera
Cancer Researcher Beatrice Mintz Dies at 100
Mintz’s experiments over her six-decade career were foundational to cancer and genetics research.
ABOVE: PHOTO COURTESY OF FOX CHASE CANCER CENTER
Cancer Researcher Beatrice Mintz Dies at 100
Cancer Researcher Beatrice Mintz Dies at 100

Mintz’s experiments over her six-decade career were foundational to cancer and genetics research.

Mintz’s experiments over her six-decade career were foundational to cancer and genetics research.

ABOVE: PHOTO COURTESY OF FOX CHASE CANCER CENTER

embryo

Multiple purple and pink renditions of stem cells appear as spherical clusters enveloped in translucent bubbles
Mammalian Embryos Might Not Need Primitive Streaks After All
Dan Robitzski | Dec 2, 2021
The primitive streak, a structure that emerges during mammalian and avian gastrulation, might be a byproduct rather than a landmark of the embryonic development process.
Illustration showing how seagull chicks know when predators are lurking
Infographic: Animal Embryos Coopt Sound to Survive and Thrive
Amanda Heidt | Nov 1, 2021
Across the tree of life, animals use sound and other vibrations to glean valuable sensory information about their environments even before they are born.
istock
How to Grow a Mouse Embryo in a Dish
Roni Dengler, PhD | Aug 3, 2021
Researchers are taking the concept of three-dimensional cell culture beyond single organoids to develop embryos from cells.
Several tadpoles in clear eggs
Slideshow: How Animal Embryos Eavesdrop on the Outside World
Amanda Heidt | Nov 1, 2021
Watch and listen to reptiles, amphibians, insects, and birds respond to sound from inside their eggs.
Illustration of two rats, one male and one female, that are surgically joined. The male has a uterus transplanted in, and both have embryos transplanted into their uteruses.
Study that Impregnated Male Rats Stirs Controversy
Andy Tay | Jun 25, 2021
A combination of approaches, including uterus transplantation and the joining of two animals’ circulatory systems, allowed males to bear pups, according to a preprint. But some experts say the experiments were not justified.  
lewis wolpert obituary developmental biology embryo 14 day rule
High Profile Developmental Biologist Lewis Wolpert Dies at 91
Shawna Williams | Feb 16, 2021
Wolpert, who conducted research at University College London, was known for his work on morphogenesis and pattern development in embryos and for his multiple books and broadcast appearances.
Panel Lays Out Guidelines for CRISPR-Edited Human Embryos
Lisa Winter | Sep 4, 2020
The International Commission on the Clinical Use of Human Germline Genome Editing claims the technology is still too risky for therapeutic use.
Image of the Day: Brainless Frogs
Amy Schleunes | Feb 18, 2020
Without a brain, the frog embryo immune system doesn’t receive the signals it needs to mobilize macrophages and fight infections.
A Woman of Firsts, Early 20th Century
Emily Makowski | Jan 13, 2020
Florence Sabin was known for her pioneering research and efforts to support women in science.
China Sentences Gene-Editing Scientist to Three Years in Jail
Emily Makowski | Dec 30, 2019
The modification of three babies’ genes by He Jiankui drew widespread criticism from scientists.
Photos of the Year
Emily Makowski | Dec 26, 2019
From bubbling plants to endangered whales, here are some amazing images from The Scientist in 2019.
Early Embryo Models Generated from Mouse Stem Cells
Abby Olena | Oct 17, 2019
Extended pluripotent stem cells from mice can self-organize to form blastocyst-like structures called blastoids that enable a closer look at early mammalian development.
human embryo
First Human–Monkey Chimeras Developed in China
Nicoletta Lanese | Aug 5, 2019
The researchers aim to grow transplantable human organs from primate embryos.
chinese pond turtle embryo temperature-dependent sex climate change
Turtle Embryos May Have a Say in Deciding Their Sex
Katarina Zimmer | Aug 1, 2019
In a species of freshwater turtle, embryos can move toward warmer or cooler environments within the egg and thus help choose their sexual destiny, but not all experts are convinced.
Scientists Push for a Moratorium on Human Germline Editing
Ashley Yeager | Mar 13, 2019
After the reported birth of CRISPRed babies in China, experts want to take time to consider the scientific, social, ethical, and philosophical consequences of editing heritable human DNA.
Ultrasound of twins
Doctors Report World’s Second Case of “Semi-Identical” Twins
Catherine Offord | Feb 28, 2019
The extremely rare event, thought to be caused by two sperm cells fertilizing the same egg simultaneously, was last reported in 2007.
Image of the Day: Cellular Tracks
Carolyn Wilke | Jan 21, 2019
To study the fate of stem cells in developing chick embryos, researchers trace their steps over time.
Image of the Day: Embryo in Blue
Carolyn Wilke | Jan 7, 2019
A bright blue stain highlights the sensory nerves of a developing mouse embryo.
CRISPR Scientists Slam Methods Used on Gene-Edited Babies
Katarina Zimmer | Dec 4, 2018
Since He Jiankui presented his results at last week’s gene editing summit, researchers have raised concerns about his protocol, calling the procedure “amateurish” and “unconscionable.”