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molecular biology
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Why Do We Get Old, and Can Aging Be Reversed?
Everybody gets older, but not everyone ages in the same way. In this episode, Steven Strogatz speaks with Judith Campisi and Dena Dubal, two biomedical researchers who study the aging process.
How the ‘Diamond of the Plant World’ Helped Land Plants Evolve
Structural studies of the robust material called sporopollenin reveal how it made plants hardy enough to reproduce on dry land.
In Test Tubes, RNA Molecules Evolve Into a Tiny Ecosystem
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.
In Sexy Worms, Inheritance Beyond Genes Can Help Evolution
Traits from RNA molecules passed between multiple generations of worms can work with genetic changes to influence future evolution.
Life With Longer Genetic Codes Seems Possible — but Less Likely
Life could use a more expansive genetic code in theory, but new work shows that improving on three-letter codons would be a challenge.
Untangling Why Knots Are Important
Steven Strogatz explores the mysteries of knots with the mathematicians Colin Adams and Lisa Piccirillo.
Secrets of Early Animal Evolution Revealed by Chromosome ‘Tectonics’
Large blocks of genes conserved through hundreds of millions of years of evolution hint at how the first animal chromosomes came to be.
The Year in Biology
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.
The Complex Truth About ‘Junk DNA’
Genomes hold immense quantities of noncoding DNA. Some of it is essential for life, some seems useless, and some has its own agenda.