Say hello to particle robots

Roboticists are fundamentally rethinking their craft. Particle robots don’t look like biological creatures, but they’re constructed like biological systems, vast in complexity and abilities, yet composed of simple parts. Are they a step toward the proverbial ‘gray goo’?

Meet the world’s biggest T. rex

Say hello to “Scotty.” The towering and battle-scarred Tyrannosaurus rex is the biggest yet discovered and the largest terrestrial predator known to science.

What’s going on with Jupiter’s Red Spot?

This giant storm has remained a nearly constant feature of Jupiter’s turbulent atmosphere for at least 300 years. How can a storm persist for so long?

What exactly is twilight?

Twilight is that magical time between daylight and darkness. Astronomers, the experts on nighttime, recognize 3 twilights.

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Acrux, brightest star in Southern Cross

You have to go far south on Earth’s globe to see the Southern Cross. Bluish Acrux, aka Alpha Crucis, is its brightest star.

Great images of fireball over Bering Sea

Last December 18, a big “fireball” or bright meteor exploded above the Bering Sea with more than 10 times the energy of the atomic blast over Hiroshima. Satellites saw it all.

Scientists gather to contemplate The Great Silence

Are we alone? If advanced alien civilizations are out there, why haven’t we heard from them? Scientists call this Fermi’s Paradox – aka The Great Silence – and they gathered in Paris last week to discuss it.

Spring already? Why time seems to fly as we age

A new theory says that the ever-slowing speed at which our brain processes images as we get older speeds up our perception of time.

How aspen leaves could save Mars rovers

Aspen trees – fondly called Quakies by some – have trembling, quivering leaves. Now those leaves have inspired an energy-harvesting mechanism that might rescue dust-laden rovers on Mars.

Astronomers clock super-fast pulsar speeding through space

The runaway pulsar escaped the blast wave of the supernova that formed it, astronomers say, and is hurtling through space so fast it could travel from Earth to the moon in just 6 minutes.

Why isn’t Easter this Sunday?

Easter generally falls on the 1st Sunday following the 1st full moon following the vernal equinox. Last night’s full moon came about 4 hours after the astronomical equinox. So why isn’t this Sunday Easter?

Do you have a magnetic compass in your head?

New evidence suggests that humans have a magnetic sense that lets our brains detect and respond to Earth’s magnetic field.

Watch the sun’s shift on your horizon

Looking for an easy, but profound, sky activity? Note how far the sunset moves on your horizon, as spring shifts toward summer, or autumn toward winter, on your part of the globe.