Here are a few animals that have twins: Image by Michael Gabler at Wikimedia. Common marmosets:  Image by David O at Wikime...

 Lactobacillus (the purple rod-shaped things) is a common bacterial species in reproductive tracts. Image by Janice Carr from the CDC ...

 Image by Luc Viatour at Wikimedia. Most of us are surrounded by animals that we take for granted every day. We see them sleep and e...

The clutches of the Polar Vortex are finally releasing its grasp on us and we can be thankful for our home heating, our layers of warm clot...

Zoetropes like this one have been used for almost 2000 years. If you look in the slits from the side, the image appears to be animated....