1. Chemistry

    Scientists Say: Rare earth element

    Rare earth elements aren’t all that rare — but skyrocketing demand for these metals makes them precious.

  2. Animals

    A new technique creates glowing whole-body maps of mice

    Removing cholesterol from mouse bodies lets fluorescent proteins seep into every tissue. That has helped researchers map entire body parts.

  3. Agriculture

    Cow dung spews a climate-warming gas. Adding algae could limit that

    But how useful this is depends on whether cows eat the red algae, a type of seaweed — or it gets added to their wastes after they’re pooped out.

  4. Tech

    High-tech solar ‘leaves’ create green fuels from the sun

    Chemists make a liquid alternative to fossil fuels from carbon dioxide, water and the sun. Their trick? They use a new type of artificial leaf.

  5. Chemistry

    Scientists Say: Valence electrons

    These far-out electrons do the hard work when it comes to chemical reactions.

  6. Plants

    A single particle of light can kick off photosynthesis

    In a new experiment with bacteria, a lone photon sparked the process of turning light to chemical energy.

  7. Chemistry

    Experiment: Test the effect of temperature on reaction time

    Alka-Seltzer tablets fizzle furiously when dropped into water. Can you make Alka-Seltzer fizz faster or more loudly by changing the water’s temperature?

  8. Physics

    Scientists Say: Explosion

    Explosions happen when chemical or nuclear reactions blow out a lot of heat, noise and expanding gas.

  9. Health & Medicine

    New patch might replace some finger-prick testing of blood sugar

    A finalist at Regeneron ISEF created a wearable patch that turns yellow when someone’s blood-sugar level gets high enough to need an insulin shot.

  10. Chemistry

    This forensic scientist is taking crime science out of the lab 

    Kelly Knight uses her past struggles and passion for forensics to inspire her students.

  11. Chemistry

    Experiment: Keep your candy cool with the power of evaporation!

    In this science project, use the energy produced when water evaporates to cool down chocolate-covered candy so it doesn't melt.

  12. Chemistry

    Scientists Say: PFAS

    Non-stick coatings, stain-resistant cloth and other common materials leach long-lived PFAS into soil and water.