A look at what appears to be biological activity and an interview with Barry DiGregorio, astrobiologist

We aren't running out of metal, but recycling is contaminating our feedstock.

A look at how meat can be replaced or produced without the use of animals

An examination of gravity: what we know about it, and what we're learning. We also take listener questions and comments.

How secure is your medical device and its data?

The costliest part of any alternative power system is the batteries. Could we store energy in other ways? What new technology might make power storage more affordable?

How do we deal with the immense quantities of plastic trash in our oceans? We look at plastics , how they are made, and how we might dispose of them properly.

Most chemical elements have brothers that are more massive or less massive but otherwise identical. Some of these isotopes can replace the element perfectly but other are unstable. This means that elements can have radioactive counterparts. Are they useful or hazardous?

These amazing materials have no resistance to electrical current. We depend on superconductors for MRIs and research. With their development we see improvements in power and motor technologies. Now they are about ready to change transportation and computing!

We take listener questions about 3D printers and how to apply them. New capabilities are appearing almost daily. See what some listeners are doing with their 3D printers. Also see how Eliza is growing and operating.