Some Assembly Required: 8 key ideas
The core ideas of Some Assembly Required, each in under a minute, written in our own words. Want the full depth? Get the book.
- IDEA 1 OF 8
Evolution tinkers with old parts
Shubin argues that major changes in life's history often came from reusing existing genes and structures in new ways.
New features are rarely built from scratch. This is a central theme of the book.
- IDEA 2 OF 8
Big changes started small
Shubin explains that features like lungs or limbs began as modifications of older structures.
Their beginnings often served different purposes before taking on new roles. Fish fins and air sacs are examples he discusses.
- IDEA 3 OF 8
Genes work like recipes with switches
Shubin describes how genes are controlled by switches that turn them on and off.
Changing these switches can create big differences between species. Small genetic tweaks can have very large effects on bodies.
- IDEA 4 OF 8
Duplicated genes create new possibilities
Shubin explains that when genes are copied by mistake, the extra copy can evolve new functions.
Many important genes arose this way. Copies give evolution spare parts to experiment with safely.
- IDEA 5 OF 8
Some genes jump around
Shubin describes Barbara McClintock's discovery of genes that move within the genome.
Her ideas were once doubted but later transformed biology. She later won a Nobel Prize for this work on maize plants.
- IDEA 6 OF 8
Viruses left useful genes
Shubin explains that parts of our DNA came from ancient viruses.
Some of these viral genes now play important roles, such as in the placenta. Our genomes carry traces of ancient infections.
- IDEA 7 OF 8
Different species find similar solutions
Shubin describes convergent evolution, where unrelated animals evolve similar features.
This shows how certain solutions arise repeatedly. Eyes and wings have evolved many separate times in different groups of animals.
- IDEA 8 OF 8
Life's history is still being read
Shubin argues that studying genomes reveals hidden stories of evolution.
New tools continue to uncover how life was assembled. Each new technique reveals more about how bodies were built over time.
Get one idea like this every daySwipe through ideas, go deeper on any of them, and save the ones that matter. Free.
Read Some Assembly Required in the app