# Math

1. Math

The metric system just got its first update in 30 years. New prefixes will help scientists interpret the biggest — and smallest — numbers.

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2. Math

### Scientists Say: Mean, median and mode

Mean, median and mode are all different ways to describe the middle value in a dataset.

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3. Math

### Let’s learn about dealing with math anxiety

Writing about math anxiety and maintaining a “growth mindset” can help soothe stress about the subject.

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4. Math

### Scientists Say: Variable

A variable is something that can be changed — such as a value in math, or a factor in an experiment.

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5. Math

### Scientists Say: Equation

An equation states that two groups of numbers or variables are equal to each other.

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6. Math

It’s not just an excuse to eat pastries. This number helps describe everything from the smallest particles to planets orbiting other stars.

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7. Physics

### Why some icicles become scallops not spikes

The newfound — and at times quirky — shapes reflect the density of water surrounding submerged ice.

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8. Math

### Scientists Say: Geometry

Geometry is math that allows people to measure, analyze and compare figures in space.

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9. Life

### From icebergs to smoke, forecasting where dangers will drift

Smoke drifts. Fish eggs float downstream. Where such drifting things end up may seem a mystery. But research can predict where they’ll end up.

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10. Animals

### Endangered or just rare? Statistics give meaning to the head counts

Whether studying tiny birds or massive whales, researchers collect a lot of data. The field of statistics helps them make sense of those data.

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11. Math

### Scientists Say: Pi

Pi is the ratio of a circle’s circumference to its diameter. But some mathematicians say life would be easier if we used a different ratio instead.

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12. Math

### Explainer: What is statistics?

Scientists use statistics to design studies, analyze data and evaluate uncertainty. You’ll find it in biology, climate change, medicine and more.

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