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Category: Development

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11 February 2002 | ScienceNOW

Cloned Mice Die Young

by Constance Holden
A new study adds premature death to the perils of being a clone
31 January 2002 | ScienceNOW

Look Mom, No Sperm!

by Constance Holden
Researchers derive stem cells from unfertilized primate eggs
Chick Beaks
19 December 2001 | ScienceNOW

Growing a Double-Beaked Chick

by Emily Sohn
Researchers track face-molding signals in the embryo
16 November 2001 | ScienceNOW

Babble On, Babycakes

by Caroline Seydel
Babies' early vocalizing seems to engage the brain's linguistic side
11 October 2001 | ScienceNOW

How Sperm Wag Their Tails

by Caroline Seydel
Discovery of a protein involved in sperm cell motility may lead to new contraceptives
10 October 2001 | ScienceNOW

Stress Hormone Shields Fetus

by Michael Hagmann
A hormone associated with inflammation protects the fetus from immune rejection
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28 September 2001 | ScienceNOW

The Green Light for Organ Development

by Caroline Seydel
Embryonic blood vessels signal tissue to form liver, pancreas
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8 August 2001 | ScienceNOW

Cloning Researchers Upstaged by Circus

by Gretchen Vogel
Claims of potential cloners overshadow research discussion
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27 July 2001 | ScienceNOW

Segmentation Gets Pieced Together

by Dennis Normile
Two new studies help clear up a universal process in the animal world
sncelltable
12 July 2001 | ScienceNOW

Egg Fertilized Without Sperm

by Gretchen Vogel
First demonstration that embryos can develop from egg plus somatic cell
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28 March 2001 | ScienceNOW

Lawmakers Consider Cloning Ban

by Gretchen Vogel
House committee warned of perils of human cloning
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22 February 2001 | ScienceNOW

Giving Birth to Brain Cells

by Laura Helmuth
Stem cells in umbilical cords help rats recover from stroke
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22 February 2001 | ScienceNOW

Nobelists Lobby Bush on Stem Cells

by Gretchen Vogel
Eminent scientists urge the president not to interfere with controversial research
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20 September 2000 | ScienceNOW

Brain Cells Turn to Muscle

by Gretchen Vogel
Neural stem cells can follow lead of peers and change their fate
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7 September 2000 | ScienceNOW

Brain Cells Turning Over a New Leaf

by Gretchen Vogel
Compounds coax rat cells back to their developmental childhood, into new careers
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1 June 2000 | ScienceNOW

Stem Cells Show New Versatility

by Gretchen Vogel
Like the shape shifters in Star Trek, stem cells in the adult brain can become several kinds of cells. Inject them into embryos, it turns out, and their ability to...
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4 May 2000 | ScienceNOW

Gene Expression Erects Species Barrier

by Elizabeth Pennisi
What makes a species a species? Biologists debate the definition, but in general a species is a group of organisms that are genetically isolated enough that mating with other organisms...
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7 March 2000 | ScienceNOW

Do Cold Babies Become Fat Adults?

by Michael Hagmann
Fat is a great insulator, and animals--including humans--store extra fat when winter sets in. Now a study of birth season and adult weight suggests that being born during the cold...
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24 February 2000 | ScienceNOW

The Brains Behind the Face

by Gretchen Vogel
WASHINGTON, D.C.--Beauty ads claim that retinoic acid, better known as vitamin A, removes wrinkles from aging faces. But a new study suggests that it is even more important for very...
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27 January 2000 | ScienceNOW

The Body Plan of Modern Life

by Elizabeth Pennisi
Although they look like blobs, sea anemones and other cnidarians have a basic anatomical plan called a body axis. That is, they have a top, defined by the mouth, and...
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24 January 2000 | ScienceNOW

Butterfly's Genetic Brushwork

by Elizabeth Pennisi
In a feat of versatility, nature long ago co-opted the genes for wing development in butterflies to paint a giant eyespot that helps confuse predators. But that's not the end...
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27 December 1999 | ScienceNOW

Looking Ahead: Getting Out the Vote

by Science News Staff
Cutting-edge science promises to be a 2000 election issue--but not in the way many researchers might hope. Antiabortion groups have put a high priority on banning taxpayer funding of promising...
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20 December 1999 | ScienceNOW

Mice Cloned From Cultured Stem Cells

by Gretchen Vogel
In an experiment that joins the booming fields of stem cells and cloning, scientists have managed to clone mice from embryonic stem cells. The report is the first demonstration that...
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1 December 1999 | ScienceNOW

NIH Opens Door to Stem Cell Research

by Gretchen Vogel
The federal government moved a step closer to funding research on some human stem cells today, when the National Institutes of Health (NIH) released draft guidelines covering the controversial research....
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18 November 1999 | ScienceNOW

Mutation Slows Aging in Mice

by Elizabeth Pennisi
A single mutation in a gene can lengthen a mouse's life by nearly a third without any noticeable harm, according to a study in today's Nature. The mutation changes the...
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3 November 1999 | ScienceNOW

Let There Be Hair

by Michael Hagmann
The roots of all hairs, their follicles, can be swapped from one person to another without bringing on fierce immune attacks seen with almost every other kind of transplanted tissue,...
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15 September 1999 | ScienceNOW

How to Gain Weight on the Cheap

by Gretchen Vogel
For fish larvae, life boils down to one thing: Eat or be eaten. And so most change into their adult shape as fast as they can. An intriguing exception are...
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24 August 1999 | ScienceNOW

Brain Research in the Womb

by Constance Holden
Brain scientists may have a new window into an unborn child's mind. Researchers have shown that functional magnetic resonance imaging (fMRI)--an imaging technology that has sprouted only in the past...
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9 June 1999 | ScienceNOW

Why Embryos Are in a Hurry

by Sanyin Siang
Scientists have shed some light on the mysterious winnowing process inside a woman's body that sorts good embryos from bad. A study in this week's New England Journal of Medicine...
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16 April 1999 | ScienceNOW

Chronicler of a Bug's Life

by Science News Staff
Today is the birthday of Sir Vincent Wigglesworth, an English entomologist born in 1899 who elucidated the physiology of insect metamorphosis. Wigglesworth discovered a number of important insect hormones, including...
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9 April 1999 | ScienceNOW

NIH to Screen Controversial Stem Cell Grants

by Eliot Marshall
WASHINGTON, D.C.--The National Institutes of Health (NIH) is moving ahead slowly on its pledge to fund controversial research on human embryonic stem cells. Yesterday, NIH chiefs unveiled a scheme in...
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2 April 1999 | ScienceNOW

Closing the Regeneration Gap

by Science News Staff
Today is the 71st birthday of Elizabeth Hay, an embryologist at Harvard Medical School who, through pioneering studies on regeneration of amphibian limbs, has shed light on the cellular mechanisms...
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8 February 1999 | ScienceNOW

Everlasting Ovaries

by Michael Hagmann
Scientists have created a strain of mice with ovaries that essentially remain young until the animals die. The success, reported in this month's Nature Genetics, might someday lead to new...
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21 January 1999 | ScienceNOW

Brain Stem Cells Show Their Potential

by Evelyn Strauss
Brain cells already do a lot, from memorizing equations to providing the information needed to navigate a crowded room. But a report in this week's issue of Science suggests that...
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3 December 1998 | ScienceNOW

Finding the Family Jewels

by Gretchen Vogel
Being in the right place at the right time is vital for young cells in a developing embryo. Now biologists report in today's Nature an intriguing new clue to how...
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25 November 1998 | ScienceNOW

Keeping Mutations at Bay

by Elizabeth Pennisi
Key players among the cell's stress management consultants, some heat shock proteins may spend their down time preventing mutations from turning into physical deformities. A study of fruit flies, reported...
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24 November 1998 | ScienceNOW

Hairy Mice Hint at Baldness Remedy

by Elizabeth Pennisi
A protein involved in cancer can also stimulate new hair growth in mice, suggesting a possible approach for curing baldness. The protein, called b-catenin, is part of a biochemical pathway...
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6 November 1998 | ScienceNOW

Genetic Tooth Fairies

by Gretchen Vogel
Long before anyone told you to drink milk to make your teeth strong, a complex system of genes made sure your molars ended up in the back of your mouth...
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5 November 1998 | ScienceNOW

Mother of All Cells Captured

by Eliot Marshall
Imagine being able to reach into the freezer, take out a cell culture, treat it with growth factors, and produce almost any tissue in the human body. Sounds like science...
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2 November 1998 | ScienceNOW

Monkeys Show Benefits of Eating Less

by Jennifer Couzin-Frankel
Scientists are edging closer to proving in primates what's been demonstrated dozens of times in rodents since the 1930s: Sharply reducing caloric intake can slow the process of aging to...
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