PBS

Over the first season of PBS Eons, we’ve explored the history of Earth from the very origins of life right up to the Cenozoic Era that we’re in now. To celebrate our first anniversary together, we’d like to answer some of your most frequently asked questions.

Insects were the first animals to ever develop the ability to fly, and, arguably, they did it the best. But this development was so unusual that scientists are still working on, and arguing about, how and when insect wings first came about.

In 1800s, miners began working in exposed deposits of mud near the town of Messel, Germany. They were extracting oil from the rock and along with the oil, they found beautifully preserved fossils of animals from the Eocene. What happened to these Eocene animals? And why were their remains so exquisitely preserved?

420 million years ago, some fish were more medieval. They wore armor, sometimes made of big plates, and sometimes made of interlocking scales. But that armor may actually have served a totally different purpose, one that many animals still use today.

This is not a Game of Thrones fan fiction episode. Dire wolves were real! And thousands of them died in the same spot in California. Their remains have taught us volumes about how they lived, hunted, died and way more about any animal’s sex life than you’d ever want to know.

Fossilized footprints have proved that human ancestors were already striding across the landscape 3.6 million years ago. But who started them on that path? What species pioneered this style of locomotion? Who was the first to walk?

Paleontologists have been studying and drawing totally different conclusions about the fossil LH PV18 for almost a decade. Is it just one of many specimens of a theropod called Tarbosaurus bataar or is it an entirely different theropod named Raptorex kriegsteini? In order to answer this question, you have to understand the many ways in which we can--and can’t--determine the age of a fossil.

In 1993, scientists cracked open a piece of amber, took out the body of an ancient weevil, and sampled its DNA. Or, at least, so we thought. It took another few decades of research, and a lot of take-backs, before scientists could figure out how we could truly unlock the genetic secrets of the past.

Temnospondyls were a huge group of amphibians that existed for 210 million years. And calling them ‘diverse’ would be putting it mildly. Yet in the end, two major threats would push them to extinction: the always-changing climate and the amniote egg.

Purgatorius, a kind of mammal called a plesiadapiform, might’ve been one of your earliest ancestors. But how did we get from a mouse-sized creature that looked more like a squirrel than a monkey -- to you, a member of Homo sapiens?

Due to an odd quirk of genetics and some unique evolutionary circumstances, two humans who lived at different times in the distant past managed to pass on a very small fraction of their genomes to you. And to me. To all of us.

So how much does it cost to own a pet?

Do your eyes glaze over when you ever hear about the DOW? Are you still confused about what the DOW is?

It's not just about payment history. Several things are taken into account when your credit score (or FICO score) is calculated.

Most of us cringe at the idea of discussing how much money we make, so asking for a raise can be tough. Here's how to get started.

Energy efficiency standards have quietly been saving people mountains of money and helping avoid planet-warming emissions at the same time.

Coral reefs cover less than one percent of the seafloor, and yet they’re home to a quarter of all marine life, making them some of the most biodiverse places on Earth. But their future looks bleak. Decades of environmental threats like warming waters and ocean acidification have pushed reefs to the brink. Can we use science to bring them back?

By the end of 2016 in the U.S., over 1 million homes had solar panels, with four times as many installed that year compared to just four years earlier. But if you don’t own the roof over your head, or can’t afford this kind of upgrade, are you left out of the solar energy revolution?

Georgetown, TX is a conservative city in the middle of oil and gas country that’s committed to 100% renewable energy, and we could learn a lot from them.

Today, lawsuits are positioning climate change as this generation's smoking: it pollutes the air, it’s caused by burning chemicals we buy from a handful of huge companies, and it’s dangerous to human health. Fossil fuel companies are being taken to court just like tobacco companies were, because of what they knew and when. Should they be forced to pay for damages from climate change?

Carbon dioxide gets a lot of grief these days. It’s the main cause of the global warming that’s already damaging coral reefs, ice caps, and coastlines. But for eons, life survived on Earth because natural processes kept CO2 levels within limits, preventing the planet from getting either too cold or too hot.

The value of money all comes down to TRUST. When did we transition from the barter system to using money? We discuss some of its origin stories.

The importance of homeownership is still embedded in American culture, but actual homeownership has dropped to its lowest level since 1967. How should we react to that? Are more young people ready to buy a home than they believe?

Time is money...right? How are on-demand services hurting and helping our wallets? When is it an investment to use these services?

Not only do we as humans make financial mistakes, our mistakes are predictable! Here's the story of how we learned that we can predict our mistakes and 5 of them you can avoid.