Animals
Will the woolly mammoth return?
Scientists are using genetic engineering and cloning to try to bring back extinct species or save endangered ones. Here’s how and why.
MS-LS3-2
Develop and use a model to describe why asexual reproduction results in offspring with identical genetic information and sexual reproduction results in offspring with genetic variation.
More Stories in MS-LS3-2
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PlantsHow Romanesco cauliflower grows spiraling fractal cones
By tweaking just three genes in a common lab plant, scientists have mimicked one of nature’s most impressive mathematical patterns.
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GeneticsJust a tiny share of the DNA in us is unique to humans
Some of these tweaks to DNA, however, may have played a role in brain evolution.
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Health & MedicineBringing COVID-19 vaccines to much of world is hard
The price of not vaccinating nearly everyone across the world could be a longer pandemic and more troubling variants of the new coronavirus.
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LifeScientists Say: Egg and sperm
An egg or a sperm cell contains half of the normal genes an organism needs. They fuse together to form a new individual.
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HumansBy not including everyone, genome science has blind spots
Little diversity in genetic databases makes precision medicine hard for many. One historian proposes a solution, but some scientists doubt it’ll work.
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HumansSome identical twins don’t have the exact same DNA
Identical twins may not be exactly identical. Mutations may arise early in development that account for tiny genetic differences between siblings.
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Health & MedicineEarly details emerge about the new U.K. coronavirus variant
The variant may spread more easily from person to person. That could make continuing to wear masks all the more important, experts say.
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GeneticsWhat would it take to make a unicorn?
Onward’s dumpster-diving unicorns seem like an impossibility. But scientists have some ideas about how unicorns could become real.
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GeneticsWhat we can — and can’t — learn from our pets’ DNA
Your dog or cat’s DNA is an open book. DNA tests tell people about their pet’s breed and attempt to predict things about its behavior and health.