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DNA

an illustration of various objects (a chair, a rocket, a cell phone, etc.) as well as biological objects such as a DNA double-helix and microbe, all against a lime green background
The Joy of Why

What Is Life?

By Steven Strogatz
June 15, 2022
Read Later

Without a good definition of life, how do we look for it on alien planets? Steven Strogatz speaks with Robert Hazen, a mineralogist and astrobiologist, and Sheref Mansy, a chemist, to learn more.

Illustration of icons that relate to life’s origins: a volcano, molecules, a crab, fish, DNA and more.
The Joy of Why

How Could Life Evolve From Cyanide?

By Steven Strogatz
June 1, 2022
Read Later

How did life arise on Earth? Steven Strogatz speaks with the Nobel Prize-winning biologist Jack Szostak and Betül Kaçar, a paleogeneticist and astrobiologist, to explore our best understanding of how we all got here.

Illustration of a wooly mammoth with its hind quarters still being assembled from digital blocks.
explainers

Why ‘De-Extinction’ Is Impossible (But Could Work Anyway)

By Yasemin Saplakoglu
May 9, 2022
Read Later

Several projects are aiming to bring back mammoths and other species that have vanished from the planet. Whether that’s technically possible is beside the point.

Illustration of a network of self-replicating RNA molecules evolving and getting more complex.
origins of life

In Test Tubes, RNA Molecules Evolve Into a Tiny Ecosystem

By Yasemin Saplakoglu
May 5, 2022
Read Later

When researchers gave a genetic molecule the ability to replicate, it evolved over time into a complex network of “hosts” and “parasites” that both competed and cooperated to survive.

Artist’s illustration representing the immune system standing guard against a world of pathogens.
The Joy of Why

Why Is Inflammation a Dangerous Necessity?

By Steven Strogatz
April 20, 2022
Read Later

The immune system protects us from a full spectrum of pathogens, but without balance, it can end up hurting us over time, too. The immunologist Shruti Naik explains how our defenses can turn on us.

Illustration that combines elements of three- and four-leaf clovers with the letter for nucleotides in codons.
synthetic biology

Life With Longer Genetic Codes Seems Possible — but Less Likely

By Yasemin Saplakoglu
April 11, 2022
Read Later

Life could use a more expansive genetic code in theory, but new work shows that improving on three-letter codons would be a challenge.

The Joy of Why

Untangling Why Knots Are Important

By Steven Strogatz
April 6, 2022
Read Later

Steven Strogatz explores the mysteries of knots with the mathematicians Colin Adams and Lisa Piccirillo.

2021 in Review

The Year in Biology

By John Rennie
December 21, 2021
Read Later

The detailed understanding of brains and multicellular bodies reached new heights this year, while the genomes of the COVID-19 virus and various organisms yielded more surprises.

Photo of Karen Miga of the University of California, Santa Cruz, with a representation of chromosomes in the background.
Q&A

Karen Miga Fills In the Missing Pieces of Our Genome

By Carrie Arnold
September 8, 2021
Read Later

Driven by her fascination with highly repetitive, hard-to-read parts of our DNA, Karen Miga led a coalition of researchers to finish sequencing the human genome after almost two decades.


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