1. Plants

    Plants don’t grow well when always on high alert

    Plants make bitter-tasting chemicals to defend themselves against hungry bugs. But they pay a cost for always being on alert, scientists find.

  2. Genetics

    Gene editing creates mice with no mom

    Scientists used gene editing to make the first ever mice with two dads. But these motherless pups died soon after birth.

  3. Genetics

    Gene editing wiped out a population of mosquitoes in lab tests

    For the first time, a gene drive caused a population crash of mosquitoes. Such gene editing could drive the malaria-carrying insects to extinction.

  4. 860_hybrid_animals_liger.png

    The mixed-up world of hybrid animals

    When animals from related species mate, they may produce hybrid offspring. These animals can display a jumble of traits, such as colors, shapes or behaviors.

  5. Life

    A ‘ghost’ gene leaves sea mammals vulnerable to some toxic chemicals

    Manatees, dolphins and other warm-blooded marine animals can't break down some common pesticides. The newfound reason: Long ago, their genes lost the ability to do so.

  6. Genetics

    Koala genes could help scientists save these furry animals

    Scientists have examined the clues within koalas’ genetic instruction book. They are learning more about how to save these cuddly creatures.

  7. Genetics

    Toxic toads pose threat to Madagascar’s predators

    The Asian common toad, an invasive species in Madagascar, produces a chemical in its skin that’s probably toxic to most of the island’s predators.

  8. Genetics

    Scientists Say: Intron

    These are sections of DNA that are trimmed out before the DNA is copied RNA and translated into protein. But they still have important jobs to do.

  9. Genetics

    Your DNA is an open book — but can’t yet be fully read

    There are many companies that offer to read your DNA. But be prepared: They cannot yet fulfill all those promises you read in their ads.

  10. Animals

    Living Mysteries: Meet Earth’s simplest animal

    Trichoplax is the simplest animal on Earth. It has no mouth, stomach or brain. Yet it can teach how these and other organs evolved.

  11. Genetics

    Scientists recruit bloodsucking leeches as research assistants

    By analyzing a slimy, bloodsucking leech’s last meal, scientists can identify which animals had been living near it.

  12. Genetics

    Explainer: DNA hunters

    Snippets of DNA can be left behind by a passing organism. Some researchers now act as wildlife detectives to identify the sources of such cast-off DNA.