A novel material can alter how easy it is to change data stored on it, based on temperature. One immediate application: more secure hard drives for computing.
A new map may explain why some brain injuries are worse than others. Even relatively minor injuries that disrupt message superhighways may have a more devastating impact than some seemingly catastrophic injuries.
By neutralizing the poison produced by fire ants, ‘crazy’ ants can survive heated battles. And that may help explain why crazy ants are edging out fire ants in parts of the southern United States.
Boys develop autism at four times the rate seen in girls. Girls’ genes are better protected from the mutations linked to this brain disorder, data now suggest.
SCIENCEBefore reading:1. How do you think moviemakers decide how dinosaurs such as those in Jurassic Park should appear and move?2. List three types of ancient animal remains other than bones.During reading:1. Which dino do scientists believe was the largest to ever walk Earth? How much did it weigh?2. What is a sauropod?3. Name two types of technology Manning’s team used to create a three-dimensional model of the Argentinosaurus skeleton.4. Explain why Manning’s team had to choose carefully how many moving parts their 3-D dino would have.5. Why did Manning’s team place most of the muscles on the rear legs of the Argentinosaurus 3-D model?6. How fast did Argentinosaurus walk, according to the researchers’ model? Does this number surprise you? Explain your answer.7. What is a trackway?
With the help of computers, researchers are getting a pretty good idea of how these ancient creatures moved, walked and ate.
It’s the first time astronomers have ever detected a cluster of stars moving collectively at such speed.
Everything making up Earth and what’s now living upon it — from trees and people to our pets and their fleas — owes their origins to the elements forged by ancient stars.
SCIENCEBefore reading:1. Humans and aliens may look worlds apart. But are they made of the same stuff? Explain your answer.During reading:1. Name two types of situations in which stars create elements and fling them out into space.2. How many elements occur naturally on Earth?3. How are an atom and a solar system alike?4. Which element has the fewest protons, and so is considered the lightest? Which element is the heaviest?5. Name three elements and where each occurs abundantly.6. About how long ago did the Big Bang occur and how long did it last?7. What do scientists mean when they say the universe is expanding?8. Which two elements were around shortly after the Big Bang? How were heavier, later elements created?9. What pulls gas molecules in giant gas clouds toward each other?
Woolly mammoths roamed the Arctic until about 10,000 years ago. Why they died out may trace to the vanishing of the mostly flowering plants on which they had been dining.
Many companies have moved the plants that make their products to developing countries, such as China. But the pollution linked to making those products can travel around the world.
Eating small amounts of peanuts may help people overcome an allergy to the food. But for most people undergoing the treatment, its benefits vanish after they stop eating peanuts.
Buildings in the United States can be deadly obstacles to flying birds. A new study estimates that as many as 1 billion birds die every year after colliding with windows. And low buildings — not skyscrapers — account for most of those deaths.
Miners may need to get their feet — and everything else — wet as they carefully seek out loads of copper and other valuable natural resources.
SCIENCEBefore reading:What is mining and what do miners typically look for? Where does most mining take place? During reading:What is Earth’s least-studied ecosystem? How many volcanoes hide under the sea? Name three types of undersea places people might find big quantities of minerals. Explain how much copper has been mined in the last quarter century, and how much more will likely be needed by 2040. How would Nautilus Minerals bring up metals from the seafloor? What kinds of undersea mining activities are — and are not — regulated by law. Why is knowing what types of damage mining might cause such a challenge to scientists and others?
People with dyslexia seem to get a boost from screen time.
Jaws may scare beachgoers. But sharks bring a smile to some environmental scientists, who are using the toothy fishes to collect data on the ocean.
Biologists now deploy a wide range of technologies to track animals. The data these experts collect reveal insights into the behavior of animals that spend much of their lives out of human eyeshot.
SCIENCEBefore reading:1. Imagine someone tracked and recorded your every movement over the course of a week. Describe at least three types of information these data would reveal about your habits and routines.2. Many birds migrate with the seasons. How could you learn more about where they travel and when?During reading:1. Define telemetry.2. Telemetry involves transmitting and receiving data. Explain the role each process plays during the tracking of tagged animals.3. How can tagging help scientists monitor the health of a specific wild animal over time?4. Why would it be difficult to track a penguin’s movements without using tagging?
What started as little metal bands have evolved into high-tech devices — some of which rely on satellites to share their findings.