Look into the night sky and you'll glimpse the stars from hundreds of billions of galaxies. Some galaxies are swirling blue disks like our own Milky Way, others are red spheres or misshapen, clumpy ...

Our region’s cacti are adapted to dry, hot conditions and thrive where many plants cannot. Cacti have lost their leaves and developed fleshy, photosynthetic stems containing water-storing pulp. Cactus ...

Frog and toad pupils come in quite the array, from slits to circles. But overall, there are seven main shapes of these animals’ peepholes, researchers report in the Aug. 25 Proceedings of the Royal ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. These levitating spheres may appear red, purple or green at first glance, but in actuality, all ...