In professional football, the advent of helmets and face masks leg to unexpected problems.  See acast.com/privacy for privacy and opt-out information.

There's strong evidence that concussions can lead to a much more serious condition.  See acast.com/privacy for privacy and opt-out information.

When a football hits the ground, it's time for a little chaos.  See acast.com/privacy for privacy and opt-out information.

Ever wonder why a football is shaped the way it is?  See acast.com/privacy for privacy and opt-out information.

You can throw a prolate spheroid - aka a football - a lot further than a basketball, or an inflated pig's bladder!  See acast.com/privacy for privacy and opt-out information.

Translating high-tech solutions for use in very low-tech environment.  See acast.com/privacy for privacy and opt-out information.

It's like attaching different bits to a drill, but on a whole other scale.  See acast.com/privacy for privacy and opt-out information.

Custom parts? No problem. Using robots and computers, architects are developing new sets of tools and new ways of designing and constructing buildings.  See acast.com/privacy for privacy and opt-out information.

The trees that we plant trees today have been through drastic, dramatic climate change, and they're really a product of it.  See acast.com/privacy for privacy and opt-out information.

What kinds of trees wouldn't you want to have in an urban environment?  See acast.com/privacy for privacy and opt-out information.

A canopy of trees helps to moderate the climate we experience as we're walking down a street.  See acast.com/privacy for privacy and opt-out information.

If you're going for a walk in the woods, here are some tips on how to avoid being bitten by ticks.  See acast.com/privacy for privacy and opt-out information.

Depending upon where you live, disease-carrying ticks can be active year round.  See acast.com/privacy for privacy and opt-out information.

The surprising backstory of Martin Luther King's most famous speech.  See acast.com/privacy for privacy and opt-out information.

Oral histories often reveal untold stories of people you may never find in a history book or a newspaper headline, but whose lives and work were truly significant.  See acast.com/privacy for privacy and opt-out information.

The stories of everyday people form an important and often overlooked part of our history.  See acast.com/privacy for privacy and opt-out information.

For years, Lyme has often gone undiagnosed.  See acast.com/privacy for privacy and opt-out information.

Imagine a holiday like Halloween, with a bit of Mardi Gras thrown in, and you'll have a pretty good idea of what Plough Monday was like - in 18th century rural England.  See acast.com/privacy for privacy and opt-out information.

Once a year, riotous behavior gave farm workers an escape from social constraints in 18th century England.  See acast.com/privacy for privacy and opt-out information.

One of the strongest triggers of memory is odor.  See acast.com/privacy for privacy and opt-out information.

If it smells bad, it probably is bad for you. That was the prevailing wisdom once and for many years, it influenced the ways we tried to prevent the spread of disease.  See acast.com/privacy for privacy and opt-out information.

It's Christmas caroling - Puerto Rican Style! In the days leading up to the Feast of Epiphany, the sounds of Parrandas are heard throughout the island.  See acast.com/privacy for privacy and opt-out information.

One of our listeners returns to his homeland of Puerto Rico each year for the celebration of the Epiphany.  See acast.com/privacy for privacy and opt-out information.

We've developed lots of ways to cover our ears, but not so many ways to cover our noses.  See acast.com/privacy for privacy and opt-out information.

The nomadic Sami herdsmen of Scandinavia have preserved their oral history in a unique form of story-song called a "yoik."  See acast.com/privacy for privacy and opt-out information.