World of Ends - what the internet is
Are You Living in a Computer Simulation?
No, really, pi is wrong: The Tau Manifesto by Michael Hartl | Tau Day, 2010
The Measurement of Science
Albert Einstein’s greatest scientific “blunder” (his word) came as a sequel to his greatest scientific achievement. That achievement was his theory of gravity, the general theory of relativity, which he introduced in 1915. Two years later, in 1917, Einstein ran into a problem while trying to apply general relativity to the Universe as a whole. At the time, Einstein believed that on large scales the Universe is static and unchanging. But he realized that general relativity predicts that such a Universe can’t exist: it would spontaneously collapse in on itself. Twelve years later, in 1929, Edwin Hubble discovered that the Universe isn’t static and unchanging, but is actually expanding. The story doesn’t end there. The point of the story of the cosmological constant is not that Einstein was a fool. The problem of measuring science Assessing science may be hard, but it’s also something we do constantly. There’s a slightly surreal quality to all this activity. One metric to rule them all
Brief Answers to Cosmic Questions
Structure of the Universe Does the Universe have an edge, beyond which there is nothing? Are the galaxies arranged on the surface of a sphere? Why can't we see the whole universe? Does the term "universe" refer to space, or to the matter in it, or to both? Evolution of the Universe Did the Universe expand from a point? More about the Big Bang When they say "the universe is expanding," what exactly is expanding? Structure of the Universe Does the Universe have an edge, beyond which there is nothing? Are the galaxies arranged on the surface of a sphere? Why can't we see the whole universe? If you could suddenly freeze time everywhere in the universe, and magically survey all of creation, you would find galaxies extending out far beyond what we can see today. Does the term "universe" refer to space, or to the matter in it, or to both? Today, the situation is reversed. Discovering the properties of space remains one of the deepest and most important problems in modern science.
The end of the net as we know it | Broadband | Features
Posted on 21 Jan 2011 at 13:34 ISPs are threatening to cripple websites that don't pay them first. Barry Collins fears a disastrous end to net neutrality You flip open your laptop, click on the BBC iPlayer bookmark and press Play on the latest episode of QI. But instead of that tedious, plinky-plonky theme tune droning out of your laptop’s speakers, you’re left staring at the whirring, circular icon as the video buffers and buffers and buffers... That’s odd. Net neutrality? The free, unrestricted internet as we know it is under threat. No such thing as net neutrality It’s worth pointing out that the concept of net neutrality – ISPs treating different types of internet traffic or content equally – is already a busted flush. “We have an unbelievably good, differentiated network at all levels, with huge levels of widespread discrimination of traffic types. Indeed, the major ISPs claim it would be “unthinkable” to return to an internet where every packet of data was given equal weight.
microscope photos
These microscope pictures are taken from the book ‘ Microcosmos’, created by Brandon Brill . This book includes many scanning electron microscope (SEM) images of insects, human body parts and household items. These are the most amazing images of what is too small to see with the naked eye. 01 – A wood or heathland Ant, Formica fusca, holding a microchip 02 – The surface of an Erasable Programmable Read-Only Memory silicon microchip 03 – Eyelash hairs growing from the surface of human skin 04 – The surface of a strawberry 05 – Bacteria on the surface of a human tongue 06 – Human sperm (spermatozoa), the male sex cells 07 – The nylon hooks and loops of velcro 08 – Household dust which includes long hairs such as cat fur, twisted synthetic and woolen fibers, serrated insect scales, a pollen grain, plant and insect remains 09 -The weave of a nylon stocking 10 – The end of the tongue (proboscis) of a hummingbird hawkmoth 11 – The head of a mosquito 12 – A human head louse clinging to a hair
Canister lets you add water (or bodily fluids) to recharge batteries
SiGNa Chemistry Inc. is launching a hydrogen-producing cartridge, the mobile-H2™, that will work with a portable, pocket-sized fuel cell charger to provide instant power for cell phones and other mobile devices. You simply add water to the cartridge, and the device will charge depleted batteries on the go. For further convenience, any water will do (even waste water). Unlike solar battery chargers, you don’t need to worry about getting enough sunlight. According to its press materials, these cartridges provide a steady level of power from beginning to end. This sounds a bit like magic, but it actually involves some well-known chemistry. SiGNa hasn’t released details on the synthesis of their sodium silicide. SiGNa’s sodium silicide might have a similar production process. When SiGNa’s sodium silicide meets water, it immediately produces low-pressure hydrogen gas (H2). The fuel cell devices are reusable, but the hydrogen-producing cartridges are not. Ars: Are the cartridges recyclable?
Graphene Will Change the Way We Live | Dr. Kaku's Universe
The theory behind the substance graphene was first explored by theoretical physicist Philip Wallace in 1947 as kind of a starting point when he was doing research trying to understand the electronic properties of more complex, 3D graphite. although the name graphene wasn't actually coined until 40 years later, where it was used to describe single sheets of graphite. In other words, it's the name given to a flat monolayer of carbon atoms that are tightly packed into a 2D honeycomb lattice; like a molecular chicken-wire that is one atom thick. It's essentially the basic building block for graphitic materials of all other dimensionalities; it's a stepping stone to building bigger things. Graphene in itself however wasn't discovered until 2004 in its full observable and testable form. Since then, in the past 6 years, scientists have discovered that the substance retains some amazing properties.
Interactive 3D model of Solar System Planets and Night Sky
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