Jupiter and the Galilean Satellites

Our largest planet and its moons inspire shock and awe

Elephant: Not an Elegy

Big and bright, long-lived and loyal, they engage our imagination

Black Holes

After some stars collapse, even light cannot escape

Valles Caldera

An ancient wonder is found not far from the atomic era’s birthplace

Blood Lines

The who, what, when, where, and how of a fluid tissue

Geology My Way

Morton Gneiss is a Minnesota rock, not a rock star

Let It Shine

Light, from the Southwest’s high desert to the surface of Mars

My Kingdom for a Horse

Homo sapiens seeks equine companionship for work and pleasure

The Lay of the Land

Through the eons with plate tectonics

They Work Hard for their Honey

So you better treat them right

Remembering Steve

A tribute to my friend Stephen Jay Gould

Till We Meet Again

And thanks for dropping by

How Mauve Was Her Garment

The effect of coal tar on Queen Victoria’s gown

Saturn

How the sixth planet from the sun is like a rubber duck

Darwin’s Finches

In the Galápagos, a speed course on evolution

Our Artful Brain

What it takes to take in, say, a Picasso

How Flowers Changed the World

They still do, every spring

My Father

Those Other Ancestors

Neandertals were big, with bigger intellects than you might think

Our National Raptor

The bald eagle makes a big impression, but its voice is small

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