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Q & A


Answers from our experts to important scientific questions.

Submit a question Our editors will select questions from those submitted and post their answers here.
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Agriculture, Forestry & Soils:
Field crops, grasses, plant fibers, spices, tree crops, herbs

- How was corn domesticated?

- What is the Green Revolution?

- What types of spectrometers are used specifically in drug testing?

Forestry

- How do temperate rainforests differ from tropical rainforests?

- How would you research the best way to design an environmentally friendly town center? I am a teacher planning a project for an environmental science class. The town center would include a movie theatre, stores, restaurants, a park and an art center.

General

- What is "precision agriculture"?

- What is the Green Revolution?

Plant breeding

- What is the Green Revolution?

Soil/crop practices

- What is the difference between weathering and erosion?

Soils

- Assuming that Fuel Cell automobiles are the most likely candidates to replace the internal combustion engine, can our forests reduce the CO and CO2 in our atmosphere, or is it too little - too late?
Sample questions from Q & A:

Computing & Information Technology
Q: Technologically, is it possible to make a conscious robot? (Answer 2)

A: Is there some X that makes humans conscious? If there is, then we might be able to find X and put it into a machine. The trouble is that no one knows.

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Earth Science
Q: Why is there so much disagreement about the validity of climate change science?

A: Understanding the many and diverse physical, chemical, and biological interactions of the atmosphere, oceans, land, and ice is an exceedingly challenging and important intellectual undertaking.

Read full answer

Medicine
Q: We have had chlorinated public water systems since the early 20th century—enough time for Cryptosporidium or Clostridium perfringens to develop metabolic or behavioral changes to survive chlorination. Why don't microorganisims become resistant to chlorine?

A: To date, no microorganism has developed resistance to the chlorine used in commercial water supplies since the chlorine kills the organism before it can develop resistance.

Read full answer
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