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One of the things that I think I find kind of most remarkable about what

modern physics has to tell us is the very nature of the elementary particles

that make up material substance. Stuff like water for example is made of

molecules H2O. We know that those hydrogen and oxygen atoms are made of

nuclei and electrons. We know the nuclei are in turn composed of protons and

neutrons. In the last 40 or 50 years we learned that protons and neutrons are

themselves not elementary particles - they're actually composites made of up

and down quarks and one of the really interesting aspects of this story, in a

sense, is first of all that the theories don't hang together at all, in

fact they don't even predict particles with mass unless we imagine that there

exists this rather mystical quantum field that spreads throughout space-time

called the Higgs field and the characteristic fluctuation of the Higgs

field is this thing called the Higgs Boson.We know from the discovery at CERN

in Geneva in 2012 that the Higgs Boson really does exist and the purpose of the

Higgs field is to give elementary particles their mass. That in itself

though doesn't explain quite what's going on with the mass of ordinary

substance. Take a proton, two up quarks and a down quark. If we add up the masses of

the individual quarks we get only 1% of the total mass of the proton. Where's the

rest of it? is a, you know, legitimate question and it turns out that we can

actually understand where the rest of that mass is gone - it's present in the

energy of the quantum field of the gluons that help bind the quarks

together inside the proton. Now Einstein's famous equation E=MC

squared was actually never given in his original

1905 paper in quite that form. In fact the equation that he gave was M (mass) is

equal to E divided by C squared. The mass of a body, an object, is a measure of its

energy content and that is the real revelation of Einstein's famous equation.

So the mass of everyone, all substance, is in fact to be found in the energy of

the quantum fields that hold matter together.

For more infomation >> What is 'Mass'? It's Energy. Einstein Was Right. - Duration: 2:50.

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What was life like during the Paleogene Time Period ? - Duration: 1:27.

Welcome to MooMooMath and Science In this video, I would like to talk about

the Paleogene Time Period Paleogene Time Period

The Paleogene time period is part of the Cenozoic era.

It lasted from 65 million to 23 million years ago.

The climate at the beginning of the Paleogene time was tropical.

This resulted in mammals, birds, and insects to scatter throughout the world.

Mammals prospered during this time.

Many of the animals we like today including dogs, cats, and pigs appeared in the Paleogene.

Sharks and whales roamed the ocean and freshwater fish branched out.

With the growth of insects, including bees flowering plants began to spread throughout

the world.

Monkeys begin to appear.

There were also several important geological events

The Himalaya mountains were created North America and Europe separate and sea

levels were low.

At the end of the Paleogene climates begin to cool.

So there you go, the Paleogene time period Thanks for watching and MooMooMath and Science

uploads a new Math and Science video every day

For more infomation >> What was life like during the Paleogene Time Period ? - Duration: 1:27.

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Boy Knocks On Door For Help Was Not Prepared For What This Man Would Do - Duration: 2:16.

Boy Knocks On Door For Help Was Not Prepared For What This Man Would Do

We are told at a young age to never talk to strangers and as adults we tell our kids the

same thing.

A young boy in the United States however, was desperate and did not think about that

advice when he started to frantically knock on doors in his neighborhood.

He had missed his school bus and needed help, but he wasn't prepared for who finally opened

the door.

At first glance, Brian Smith looks like a big, muscular and pretty serious guy with

tattoos — someone you probably woudn't want to mess with.

But never judge a book by its cover.

Brian is living proof of just that.

When the young boy missed his school bus that day, he became desperate and began to knock

on every door in his neighborhood.

He asked anyone who opened if they would give him a ride to school, but nobody wanted to

help — until Brian opened his door.

Brian explains in a post on his Facebook page how he was fast asleep when someone banged

on his door first thing in the morning.

"I open it like what up 'lil homie'," he says in the post.

The boy told Brian that he'd missed his bus and knocked on three doors before him,

but nobody wanted to help him.

Without a single hesitation, Brian, who was half asleep, woke himself up, put his shoes

on and drove the little boy to school.

"Go get that education young 'brotha'!"

Brian says in his Facebook post.

Brian's Facebook post has now been liked by over 300,000 people and shared by over

134,000.

Hundreds have left comments praising the young man.

"Thanks for taking time out to help a child who needed it, there are not many people who

do that nowadays," says one comment.

It's nice to see that neighbors still help neighbors.

Please share if you think the world needs more people like Brian!