HotStream.org

You are browsing ‘Science’ tagged videos

It now seems that our entire universe is living on borrowed time. How long it can survive depends on whether Stephen Hawking’s theory checks out. Special thanks to Ivan Bridgewater for use of footage.

Time is flying by on this busy, crowded planet… as life changes and evolves from second to second.

And yet the arc of human lifespan is getting longer: 65 years is the global average … way up from just 20 in the Stone Age.

Modern science, however, provides a humbling perspective. Our lives… indeed the life span of the human species… is just a blip compared to the age of the universe, at 13.7 billion years and counting.

It now seems that our entire universe is living on borrowed time…

And that even it may be just a blip within the grand sweep of deep time.

Scholars debate whether time is a property of the universe… or a human invention.

What’s certain is that we use the ticking of all kinds of clocks… from the decay of radioactive elements to the oscillation of light beams… to chart and measure a changing universe… to understand how it works and what drives it.
Our own major reference for the passage of time is the 24-hour day… the time it takes the Earth to rotate once. Well, it’s actually 23 hours, 56 minutes and 4.1 seconds… approximately… if you’re judging by the stars, not the sun.
Earth acquired its spin during its birth, from the bombardment of rocks and dust that formed it.
But it’s gradually losing that rotation to drag from the moon’s gravity.
That’s why, in the time of the dinosaurs, a year was 370 days… and why we have to add a leap second to our clocks about every 18 months.
In a few hundred million years, we’ll gain a whole hour.
The day-night cycle is so reliable that it has come to regulate our internal chemistry.
The fading rays of the sun, picked up by the retinas in our eyes, set our so-called “circadian rhythms” in motion.

Read the rest of this entry »

Professor Brian Cox visits Geneva to take a look around Cern’s Large Hadron Collider before this vast, 27km long machine is sealed off and a simulation experiment begins to try and create the conditions that existed just a billionth of a second after the Big Bang.

Cox joins the scientists who hope that the LHC will change our understanding of the early universe and solve some of its mysteries.

News: Not to be thwarted by a few annoying speed bumps on the road to discovery, CERN scientists have successfully slammed accelerated protons together inside the giant Large Hadron Collider (LHC) in order to re-create conditions within the universe just moments after the Big Bang.

With two streams of particles travelling at close to the speed of light and moving around the giant ring-shaped accelerator in opposite directions, attending scientists at the CERN facility just outside Geneva created the very first collision at a little after 1100 GMT – causing widespread celebration amongst those who witnessed it.
Read the rest of this entry »

* The human body is made up of around 100 trillion cells.
* The human brain contains 100 billion neurons (nerve cells) — about as many stars are in the Milky Way Galaxy — and it can generate enough electricity to power a lightbulb for 24 hours.
* The heart pumps 100,000 times per day, sending 8 to 10 pints of blood through about 60,000 miles (96,560 kilometers) of blood vessels.
* A newborn baby’s skeleton has 300 parts. Gradually, these fuse together during childhood to form the 206 bones of an adult. By the time you are 25, this process is complete.
* We change our skin about every 4 weeks. Every minute, we shed as many as 30,000 dead skin cells.
* The human head has around 100,000 hairs. We lose 40 to 100 every day. Each follicle grows around 20 times in a lifetime.
* The combined growth of hair on your head and body totals 100 inches (254 centimeters) a day, making an incredible 7 miles (11 kilometers) of hair a year.
* We breathe an average of 700 million breaths over the course of an average lifetime of 70 years.

Read the rest of this entry »

We humans seem to run to the beat of time, often without being aware of how this is the case or how our perception of it may differ from another person’s, from nature’s rhythms or from our own internal clock. In the first episode of the series, string theory pioneer Michio Kaku witnesses one of the most extraordinary feats of timing in nature on a remote Californian beach.
Read the rest of this entry »

To consider the space solar power concept requires an understanding of science, technology, engineering, math, energy, policy, environmental factors, and more. Space solar power is an engineering project on a scale that rivals the greatest in history. Students need to be informed and able to participate in the conversation.
Read the rest of this entry »

Human beings are in contact with the universe only through their five senses. No one can reach the real “external world” by going beyond these senses. So, how can we know that this world is not different from what we perceive it to be? This film invites you to ponder on this important question. When you watch this film, you will see how mistaken the materialist philosophy is when it denies God by assuming that matter is absolute. This film is based on the book “Timelessness and the Reality of Fate

Read the rest of this entry »

Experts say over the next hundred years the “perfect storm” of population growth, resource depletion and climate change could converge with catastrophic results.

In order to plan for the worst, we must anticipate it. In that spirit, guided by some of the world’s experts, ABC News’ “Earth 2100,” hosted by Bob Woodruff, will journey through the next century and explore what might be our worst-case scenario.
Read the rest of this entry »

Everything you’re about to read here seems impossible and insane, beyond science fiction. Yet it’s all true.

Scientists now believe there may really be a parallel universe – in fact, there may be an infinite number of parallel universes, and we just happen to live in one of them. These other universes contain space, time and strange forms of exotic matter. Some of them may even contain you, in a slightly different form. Astonishingly, scientists believe that these parallel universes exist less than one millimeter away from us. In fact, our gravity is just a weak signal leaking out of another universe into ours.

The same but different

For years parallel universes were a staple of the Twilight Zone. Science fiction writers loved to speculate on the possible other universes which might exist. In one, they said, Elvis Presley might still be alive or in another the British Empire might still be going strong. Serious scientists dismissed all this speculation as absurd. But now it seems the speculation wasn’t absurd enough. Parallel universes really do exist and they are much stranger than even the science fiction writers dared to imagine.
Read the rest of this entry »