A red male cardinal and a brownish female sit on a branch in front of a green background.
| 10+ min read
Animals across the tree of life have developed a mind-boggling variety of ways to become male or female.

Sex chromosomes

Artist’s rendition of two X chromosomes in blue, with a glowing orange line swirling around one.

Male and Female Stem Cells Derived from One Donor in Scientific First

Blue 3D illustration of X-shaped chromosomes

X Chromosome Silenced in Some Cancers in Males

Infographic: How Some X-Chromosome Genes Escape Inactivation

Genes that Escape Silencing on the Second X Chromosome May Drive Disease

Unbalanced Chromosomal Inheritance More Common than Thought

nettie stevens x and y chromosome name origin the scientist

How Chromosomes X and Y Got Their Names, 1891

Fruit Fly Geneticist Bruce Baker Dies

Why, Oh Y?

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Universe 25 Experiment

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Babies Form Memories. Why Do Adults Forget Them?   

3D illustration of a blue virus (center) surrounded by magenta antibodies. More blue viruses are in the background.

Viruses That Mimic Human Proteins May Be More Common than Previously Thought  

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The Advent of Automated and AI-Driven Benchwork

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Olink® Reveal: Accessible NGS-based proteomics for every lab

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A greyscale image of cells dividing.
March 2025, Issue 1

How Do Embryos Know How Fast to Develop

In mammals, intracellular clocks begin to tick within days of fertilization.

View this Issue
iStock: Ifongdesign

The Advent of Automated and AI-Driven Benchwork

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Discover the history, mechanics, and potential of PCR.

Become a PCR Pro

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3D rendered cross section of influenza viruses, showing surface proteins on the outside and single stranded RNA inside the virus

Genetic Insights Break Infectious Pathogen Barriers

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A photo of sample storage boxes in an ultra-low temperature freezer.

Navigating Cold Storage Solutions

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New DeNovix Helium Nano Volume Spectrophotometer

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Olink® Reveal: Accessible NGS-based proteomics for every lab

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Zymo Research Launches the Quick-16S™ Full-Length Library Prep Kit