Does Sharing the Womb with a Brother Affect Girls?
Does Sharing the Womb with a Brother Affect Girls?
A study links having a male twin with women’s educational, financial, and childbearing decisions. Researchers suspect prenatal exposure to testosterone may play a role.
Does Sharing the Womb with a Brother Affect Girls?
Does Sharing the Womb with a Brother Affect Girls?

A study links having a male twin with women’s educational, financial, and childbearing decisions. Researchers suspect prenatal exposure to testosterone may play a role.

A study links having a male twin with women’s educational, financial, and childbearing decisions. Researchers suspect prenatal exposure to testosterone may play a role.

Mars, developmental biology
Opinion: Slow Down, SpaceX
Opinion: Slow Down, SpaceX
Mohamed Kashkoush | Mar 15, 2019
Rockets can transport humankind to Mars, but only the scientific and medical community can ensure our survival.
Doctors Report World’s Second Case of “Semi-Identical” 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.
Mutations in One Gene Linked to Two Separate Birth Defects
Mutations in One Gene Linked to Two Separate Birth Defects
Emma Yasinski | Feb 1, 2019
The same network of transcription factors may be responsible for both cleft palate and neural tube defects, according to a new study connecting mouse and human data.
Presence of Bacterial Pathogen Blocks <em>Arabidopsis</em> Germination
Presence of Bacterial Pathogen Blocks Arabidopsis Germination
Jef Akst | Feb 1, 2019
A compound produced by Pseudomonas aeruginosa activates signaling pathways that prevent seeds from growing in unfavorable environments.
Image of the Day: Mouse Tails
Image of the Day: Mouse Tails
Carolyn Wilke | Jan 24, 2019
Genetic mutations create lab mice with unusually long and short tails.
Image of the Day: Cellular Tracks
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.
Leader of Evo-Devo Field, Rudy Raff, Dies
Leader of Evo-Devo Field, Rudy Raff, Dies
Jef Akst | Jan 9, 2019
The Indiana University professor was known for his research on the evolution of organismal development.
Image of the Day: It&rsquo;s a Shark!
Image of the Day: It’s a Shark!
Carolyn Wilke | Jan 8, 2019
A newly developed underwater ultrasound reveals a fetal shark swimming between the two uteri of its mother.
Image of the Day: Embryo in Blue
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.