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  • Reviews & Previews

    This history book offers excellent images but skimps on modern science

    The Oxford Illustrated History of ScienceIwan Rhys Morus, ed.Oxford Univ., $39.95

    Books about the history of science, like many other histories, must contend with the realization that others have come before. Their tales have already been told. So such a book is worth reading, or buying, only if it offers something more than the same old stories.

    In this case, The Oxford...

    07/23/2017 - 08:00 History of Science
  • Wild Things

    Fire ants build towers with three simple rules

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    When faced with rushing floodwaters, fire ants are known to build two types of structures. A quickly formed raft lets the insects float to safety. And once they find a branch or tree to hold on to, the ants might form a tower up to 30 ants high, with eggs, brood and queen tucked safely inside. Neither structure requires a set of plans or a foreman ant leading the construction...

    07/21/2017 - 14:54 Animals
  • Say What?

    Earth might once have resembled a hot, steamy doughnut

    Synestia\sin-es-ti-ə \ n.

    A large spinning hunk of hot, vaporized rock that forms when rocky, planet-sized objects collide

    Earth may have taken on a jelly doughnut shape early in its history. The rocky planet was spinning through space about 4.5 billion years ago when it smacked into a Mars-sized hunk of rotating rock called Theia, according to one theory (SN: 4/15/17, p. 18). That hit...

    07/21/2017 - 09:00 Planetary Science
  • Growth Curve

    Baby-led weaning won’t necessarily ward off extra weight

    When my younger daughter was around 6 months old, we gave her mashed up prune. She grimaced and shivered a little, appearing to be absolutely disgusted. But then she grunted and reached for more.

    Most babies are ready for solid food around 6 months of age, and feeding them can be fun. One of the more entertaining approaches does not involve a spoon. Called baby-led weaning, it involves...

    07/21/2017 - 07:00 Child Development, Health
  • News

    Resistance to CRISPR gene drives may arise easily

    A genetic-engineering tool designed to spread through a population like wildfire — eradicating disease and even whole invasive species — might be more easily thwarted than thought.

    Resistance to the tools, called CRISPR gene drives, arose at high rates in experiments with Drosophila melanogaster fruit flies, researchers at Cornell University report July 20 in PLOS Genetics. Rates of...

    07/20/2017 - 16:35 Genetics, Science & Society, Animals
  • News

    Majorana fermion detected in a quantum layer cake

    A particle that is its own antiparticle seems to have left its calling card within a solid material.

    To observe the signature of that particle, a Majorana fermion, scientists coupled a thin film of a topological insulator — which conducts electricity on its edges but is insulating within — with a layer of a superconductor, in which electrons can flow without resistance. In this layer...

    07/20/2017 - 15:58 Condensed Matter
  • News

    Cows produce powerful HIV antibodies

    An unlikely hero has emerged in the quest to fight HIV: the cow. In a first for any animal, including humans, four cows injected with a type of HIV protein rapidly produced powerful antibodies against the virus, researchers report. Learning how to induce similar antibodies in humans may be key to a successful HIV vaccine.

    The antibodies, called broadly neutralizing antibodies, can stop...

    07/20/2017 - 14:46 Biomedicine, Health, Immune Science
  • Science Ticker

    Elephant seals recognize rivals by the tempo of their calls

    The tempo of a male elephant seal’s call broadcasts his identity to rival males, a new study finds.

    Every male elephant seal has a distinct vocalization that sounds something like a sputtering lawnmower — pulses of sound in a pattern and at a pace that stays the same over time.

    At a California state park where elephant seals breed each year, researchers played different variations...

    07/20/2017 - 12:00 Animals
  • Science Ticker

    New Horizons’ next target caught making a star blink

    With Pluto in its rearview mirror, the New Horizons spacecraft is zipping towards a more far-out object. But it’s not flying blind. Using ground-based telescopes, the New Horizons team has spotted its next destination eclipsing a distant star. The event will reveal the rock’s specs in advance of the spacecraft’s visit in a year and a half.

    The object, called 2014 MU69, lives in the...

    07/20/2017 - 07:00 Planetary Science, Astronomy
  • Science Ticker

    This robot grows like a plant

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    Robots are branching out. A new prototype soft robot takes inspiration from plants by growing to explore its environment.

    Vines and some fungi extend from their tips to explore their surroundings. Elliot Hawkes of the University of California in Santa Barbara and his colleagues designed a bot that works on similar principles. Its mechanical body sits inside a plastic...

    07/19/2017 - 17:26 Robotics, Plants