Our grandfathers refugees.

We are experiencing what our grandparents and parents experienced.

For 40 years this was exactly what had frightened our grandfathers, fathers and now us.

We have far more money and much greater technological ability to adapt than our forebears ever did.

In our ancestral communities, the attacks are far worse we all know of the repeated cases of murders against our kin.

Today, we young people live in a world that you adults and our forefathers have made.

So melanin was recruited, in our lineage, and specifically in our earliest ancestors evolving in Africa, to be a natural sunscreen.

But, you know, before I get too far into condemning our ancestors, I thought I'd show you this is my conference room.

Because, after all, within living memory, they were hunters and gatherers, living pretty much like our ancestors lived for maybe 99 percent of the human story.

Imagine if our ancestors had made a similar valuation in the past, deciding to protect swampland at all cost.

Lebanon is special, we know, because our ancestors are Phoenician and because we can swim and ski in the same day.

Because it was discovery of grain by our ancient ancestors for the first time that produced a food source that was large enough and stable enough to support permanent settlements.

In practice, green accounting might easily have led our forefathers not to cut down forests, because this would entail losing a valuable resource.

The possible links between Jamaican culture and Halloween get Geoffrey Philp blogging about death and the sacrifices that our ancestors made for us to be here.

I'm sure that, throughout the hundred thousand odd years of our species' existence, and even before, our ancestors looked up at the night sky, and wondered what stars are.

It took our ancestors hundreds, if not thousands of years to build our cities in the sands and our palaces in the mountains.

So when you think about your parents or your grandparents, at best they may have created some photos or home videos, or a diary that lives in a box somewhere.

Meanwhile, our gatherer ancestors ate carbohydrates (polymers of glucose), which was also transported to the liver, via the glycolytic pathway, and broken down for energy.

All humans share some common bits of DNA, passed down to us from our African ancestors. Geneticist Spencer Wells talks about how his Genographic Project will use this shared DNA to figure out how we are in all our diversity truly connected.

We live in places like this as if they're the most natural things in the world, forgetting that because we're animals and that we need to eat, we're actually as dependent on the natural world as our ancient ancestors were.

For tens of thousands of years our ancestors understood the world through myths, and the pace of change was glacial. The rise of scientific understanding transformed the world within a few centuries. Why? Physicist David Deutsch proposes a subtle answer.

Our hunter ancestors ate fat, which was transported to the liver and broken down by the lipolytic pathway to deliver fatty acids to the mitochondria (the subcellular structures that burn food to create energy).

Are you curious about how would Youtube look like in the times of our grandparents? Camila Oliveira shares a set of vintage posters featuring Skype, Facebook and Twitter, by Maxi Midia designers Rodolfo Sampaio and Marco Martins.

Unlike our forebears, who did very little or nothing about urban heat islands, we are in a good position to tackle many of their effects.

Imagine if our ancestors had made a similar valuation in the past, deciding to protect swampland at all cost. Much of lower Manhattan would still be a swamp, rather than being turned into the powerhouse of New York City, at a huge cost to society.

Even as temperatures have risen, heat related deaths have decreased, owing to improved health care, access to medical facilities, and air conditioning. We have far more money and much greater technological ability to adapt than our forebears ever did.