Evaluate competing design solutions using a systematic process to determine how well they meet the criteria and constraints of the problem.

  1. Tech

    Teens want to make windshield wipers obsolete

    Windshield wipers often can’t keep up with the rain. High-intensity air sprays might one day take their place, according to research by two teens.

  2. Tech

    Cool Jobs: Big future for super small science

    Scientists using nanotechnology grow super-small but very useful tubes with walls no more than a few carbon atoms thick. Find out why as we meet three scientists behind this huge new movement in nanoscience.

  3. Space

    Mini-sats: The trick to spying Earth-bound asteroids?

    NASA is supposed to begin nonstop screening by 2020 for all asteroids that could pose a threat to Earth. Some astronomers now think the only way to affordably meet that deadline is by using mini-satellites

  4. Computing

    3-D Recycling: Grind, melt, print!

    A new 2-in-1 desktop machine quickly recycles plastic trash into low-cost 3-D printer ‘ink’ at the push of a button.

  5. Physics

    Machine simulates the sun’s core

    A machine heats iron atoms to temperatures that match the interior of the sun. This has helped solve a solar mystery.

  6. Computing

    Virtual wounds: Computers probe healing

    To better understand how the body heals wounds, scientists have begun creating computer programs that let virtual cells fight it out. These ‘computer games’ could lead to better medicines.

  7. Tech

    Rewritable paper: Prints with light, not ink

    Rewritable paper could save money, preserve forests and cut down on waste — and all without using any ink.

  8. Tech

    Make your own mini hovercraft

    Hovercraft aren’t just the cars of the future. You can make your own with just a few household items.

  9. Tech

    Explainer: What is 3-D printing?

    A new type of computer printer is already doing a lot more than spraying ink onto paper. Some dispense metal, plastic, food — even cells. In short order, people may be able to manufacture almost anything from their home or office.

  10. Tech

    Fashioning inks to ‘print’ tissues

    3-D printing may one day create life-saving tissues and organs for transplants. But first researchers are learning how to tailor cell-filled “inks” for use in inkjet printers.

  11. Chemistry

    Chemistry: Green and clean

    “Green” means environmentally friendly and sustainable. Green chemistry creates products and processes that are safer and cleaner — from the start.

  12. Wire critter shows power of surface tension

    Water striders walk on water by using surface tension. Now you can do the same with a wire critter weight-lifting contest.