Satellites versus the stars

Here's a little fact you might have heard before: Humans are around 70% water. About the same percentage as a sweet potato, incidentally. But what does that actually mean? Sure, there's blood, that accounts for some of it. And the lymphatic system has a fair amount too, sloshing ...  Show more

An ant becomes infected by a fungus which takes over its nervous system, turning the ant into a vehicle for the fungus’s reproduction and killing the ant in the process. It sounds like science fiction, but it is happening in rainforests around the world.It is a parasitic relation ...  Show more

There are hundreds of satellites orbiting the Earth, but it's not always easy to see them. Get Marshall's tips on how to spot satellites in this episode of BrainStuff.

Lower manufacturing costs, innovative launch vehicles, miniaturized sub-systems and new sensor technologies have resulted in a surge in the number of satellites orbiting earth. The more than 1,300 small satellites orbiting earth means we can now scan any given location on the pla ...  Show more

You’ve seen them streak across the sky — tiny points of light that are not stars. Satellites are now so numerous, they are changing the night sky and creating new challenges. Skip Montreux and Samantha Vega look at the booming business of commercial satellites. From SpaceX’s Star ...  Show more

There are now nearly 12,000 satellites orbiting Earth. What does it cost to put them there, and how do they make money? Zachary Crockett launches an investigation.