Physical Science

Physical science is the study of the physical world around you. Learn about everything from electricity to magnetism in this section.

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It's a young lady! It's an old woman! It's a blue dress! No, it's gold! Why are we fooled by optical illusions and what do they tell us about how the brain works?

By Meisa Salaita

How effective is fighting a wildfire with controlled fire?

By Oisin Curran

In 1957, Hugh Everett first wrote about the multiverse — different realms where every choice spawns a separate universe in which another version of ourselves does something different. It sounds crazy, but here are some reasons it might be true.

By Patrick J. Kiger

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You use solenoids every day without ever knowing it. So what exactly are they and how do they work?

By Mark Mancini

Scientists at the Lawrence Berkeley National Laboratory just made history with einsteinium. They held a sample of the short-lived element long enough to measure some of its chemical properties.

By Dave Roos

From soap to pharmaceutical products, glycerine has many applications.

By Jesslyn Shields & Austin Henderson

You may remember from math class that a prime number is a number that can only be divided by 1 and itself. But why are they important anyway?

By Patrick J. Kiger

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Rational numbers can be expressed as the ratio of two integers, while irrational numbers, such as square roots of non-square numbers, cannot.

By Patrick J. Kiger & Austin Henderson

Bayes' theorem describes the probability of an event, based on prior knowledge of conditions that might be related to the event. Sounds intimidating, but we'll walk you through it.

By Mark Mancini

Science requires that we make guesses, which is why we have confidence intervals.

By Jesslyn Shields

Adrenochrome has been linked to schizophrenia and the LSD counterculture movement. Now QAnon conspiracy theorists say it's part of a child sex-trafficking cult. So what's the truth behind this chemical compound?

By Jennifer Walker-Journey