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illustration of human oocyte
Mammalian Oocytes Store mRNA in Newly Found Membraneless Structure
The findings answer the longstanding question of where these cells hold the mRNA needed to cope with the transcriptional halt preceding meiosis.
Mammalian Oocytes Store mRNA in Newly Found Membraneless Structure
Mammalian Oocytes Store mRNA in Newly Found Membraneless Structure

The findings answer the longstanding question of where these cells hold the mRNA needed to cope with the transcriptional halt preceding meiosis.

The findings answer the longstanding question of where these cells hold the mRNA needed to cope with the transcriptional halt preceding meiosis.

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Brown coral in shallow water branching upward with blue fish in front. 
Corals Upend Longstanding Idea About Genetic Inheritance
Natalia Mesa, PhD | Sep 1, 2022 | 4 min read
Most animals can’t pass on mutations that arise spontaneously throughout their lives—but Elkhorn corals can.
Close-up of baby olive ridley sea turtle (Lepidochelys olivacea)
Moving Sea Turtle Eggs May Affect Hatchling Development
Margaret Osborne | Jul 28, 2022 | 5 min read

Hatchlings from eggs incubated in a natural nest were larger, exhibited faster neuronal development, and performed better on a motor activity test than those from eggs that were incubated in a hatchery, a study finds.

Brown bird in nest surrounded by pink flowers
Earlier Nesting in Chicago-Area Birds Linked to Warming
Natalia Mesa, PhD | Apr 4, 2022 | 2 min read
A study finds that dozens of bird species are nesting up to 25 days sooner each year than they were a century ago, likely due to climate change.
mummy
Scratchy Scalps Help Glue Together Pieces of an Ancient Past
Chloe Tenn | Dec 29, 2021 | 3 min read
Scientists find human DNA preserved in lice cement from the heads of South American mummies.
Baby Born from Egg that Was Matured and Frozen in the Lab
Catherine Offord | Feb 19, 2020 | 2 min read
A cancer patient who underwent the new fertility preservation procedure successfully gave birth five years after her immature eggs were collected.
Aneuploidy Could Explain Variability in Female Fertility: Study
Catherine Offord | Jan 13, 2020 | 2 min read
Eggs from girls and from older women show higher rates of errors in chromosome number.
Image of the Day: Scrambled Frog Eggs
Emily Makowski | Nov 6, 2019 | 2 min read
Cellular innards can reorganize themselves to form structures similar to cells.
Image of the Day: Synchronous Spawning
Emily Makowski | Sep 9, 2019 | 1 min read
Groups of corals release all of their eggs and sperm once a year, but the timing of their spawning is under threat from climate change.
Unhatched Gulls Shake Their Shells to Warn Siblings of Danger
Nicoletta Lanese | Jul 23, 2019 | 2 min read
The unborn chicks translate auditory alarms from adult birds into quaking vibrations.
milkweed bug eggs Oncopeltus fasciatus
Ecology, Not Physics, Explains Diversity of Insect Eggs
Viviane Callier | Jul 3, 2019 | 6 min read
Insect eggs can take any shape at almost any size, refuting explanations for their dimensions based on geometric scaling laws or on relationships between egg traits and adult traits.
Voodoo Dolls, Roller-Coasters for Kidney Stones Win at Ig Nobels
Ashley Yeager | Sep 14, 2018 | 2 min read
The awards for comical but practical scientific discovery also include cannibalism and self-colonoscopy.
Image of the Day: A Good Egg
Sukanya Charuchandra | Jul 18, 2018 | 1 min read
Osprey numbers are recovering after a drop in contaminants in the Delaware Estuary.
Large Female Fish Play a Big Role in Replenishing Populations: Study
Diana Kwon | May 11, 2018 | 2 min read
Bigger, older mothers produce disproportionately more eggs than their smaller counterparts do.
Image of the Day: Eggshell Edifice
The Scientist Staff and The Scientist Staff | Apr 6, 2018 | 1 min read
A new 3-D model plumbs the molecular intricacies of eggshell composition.
Image of the Day: Tardigrade Eggs
The Scientist Staff and The Scientist Staff | Mar 2, 2018 | 1 min read
The studded cells belong to a newly discovered species of water bear, Macrobiotus shonaicus. 
Coral Sperm Banker
The Scientist Staff | Jan 31, 2018 | 1 min read
Mary Hagedorn is racing to save Earth’s coral reefs by developing techniques for freezing the colonial animals’ gametes.
Hundreds of Pterosaur Eggs Discovered in China
Kerry Grens | Nov 30, 2017 | 1 min read
The fossil booty includes some eggs with embryo remains inside, and points to group nests involving long-term parental care.
Long Egg Incubations May Have Doomed the Dinosaurs
Diana Kwon | Jan 4, 2017 | 1 min read
An investigation of fossilized teeth reveals that some dinosaurs took more than six months to hatch, hindering their abilities to procreate quickly and efficiently.
Further Support for Early-Life Allergen Exposure
Jef Akst | Sep 20, 2016 | 3 min read
Egg and peanut consumption during infancy is linked to lower risk of allergy to those foods later in life, according to a meta-analysis.
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