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The switch from maternal factors involves dynamic reprogramming of the zygotic genome.

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image: Infographic: The Hazards of Life on Mars

Infographic: The Hazards of Life on Mars

By Diana Kwon | December 1, 2017

High levels of radiation, among other health risks, challenge the future colonation of the Red Planet.

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New technologies reveal the dynamic changes in mouse and human embryos during the first week after fertilization.

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image: Search for Life on the Red Planet

Search for Life on the Red Planet

By Diana Kwon | December 1, 2017

Growing evidence points to a once-habitable world—and recent findings suggest that life could exist on Mars today.

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image: Hundreds of Pterosaur Eggs Discovered in China

Hundreds of Pterosaur Eggs Discovered in China

By Kerry Grens | November 30, 2017

The fossil booty includes some eggs with embryo remains inside, and points to group nests involving long-term parental care.

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image: Image of the Day: Ice Age Horse 

Image of the Day: Ice Age Horse 

By The Scientist Staff | November 29, 2017

Scientists have identified a new genus of extinct horse that lived in North America during the last ice age. 

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image: Image of the Day: Skate Youngsters 

Image of the Day: Skate Youngsters 

By The Scientist Staff | November 28, 2017

Scientists study the development of scales in skate embryos. 

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image: Flies’ Feet Can Spread Bacteria

Flies’ Feet Can Spread Bacteria

By Kerry Grens | November 27, 2017

Lab experiments and metagenomic analyses of flies’ resident bacteria indicate that the insects carry microbes from place to place on their legs.

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image: Dolly’s Cloning Likely Didn’t Cause Premature Aging

Dolly’s Cloning Likely Didn’t Cause Premature Aging

By Katarina Zimmer | November 24, 2017

A new analysis of Dolly’s skeleton suggests the cloned sheep’s arthritis did not lead to her death. 

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The 10-micrometer-long flagellate cell might have a big story to tell about the evolution of eukaryotes.

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