Image of Roses
Science

Will Flowering Plants Take Over the World?

Flowering plants arrived relatively late in geological time, between 290 to 145 million years ago. But once here, they evolved quickly and often displaced many other types of plants. In fact, in terms of species, flowering plants are the dominant plant form on Earth today with more than 300,000 types. Learn how their unique reproductive mechanisms led to this explosion of speciation in such a relatively short time.
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Image of a tomato
Science

The Tomato—Fruit or Vegetable?

Go to any grocery store’s produce section and you will most likeley find tomatoes displayed among their vegetable friends. Yet in the world of botany, they’re actually considered berries. Why do tomatoes suffer from this produce identity crisis? […]

image of the eagle nebula by the hubble telescope
Astronomy

Hubble Images—Exploring the Birthplace of Stars

Among the incredible Hubble cloud images, none has been received with greater public acclaim than the detailed 1995 snapshot of newborn stars emerging from giant pillars of gas and dust inside the Eagle Nebula. This image looks like a fantasy landscape out of a dream or a children’s story. Get ready to explore this image in the context of galactic interstellar clouds, the process of star formation, and the impact of young stars on their interstellar environments. […]

Engineering

Alternating Current vs. Direct Current—What’s The Difference?

Examine the nuances of alternating and direct currents, see how transformers use electromagnetic induction to transform voltage levels in AC circuits, and observe the role of diodes and capacitors in regulating current. See how the DC power supplies that charge our cell phones are constructed so that they convert alternating to direct current. […]

Image of lady and overlay of a brain for emotions post
Biology

Are Women More Emotional Than Men?

Are Women More Emotional Than Men? This idea that men and women think, talk, and understand things differently has existed for decades—inspiring books, college courses, research studies, and countless sitcoms. The truth is much more complicated and nuanced. […]

Image of lightning and random number sequence for probability defined post
Applied Math

Our Random World—Probability Defined

While it’s nice to think that our challenge in life is to get rid of uncertainty and be in complete control of everything, that is not going to happen. One of life’s real challenges is to deal with the uncertain and the unknown in some sort of an effective way; and that is the realm of probability. […]

Earth Science

How Weather Radar Saves Lives

Weather radar technology has revolutionized the forecasting of severe storms and has saved many lives. The revolution began in the evening of April 9, 1953, when two meteorologists at the Illinois State Water Survey decided to break the rules… […]

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