17 JUN 2013 by ideonexus
Banks Knows What Caused His Cancer
As we walk to the door, Banks pulls one final, left-field surprise. "Do you know that I know what caused the cancer?" I think I pull a face like Macaulay Culkin in Home Alone. "Cosmic ray," he says. "I won't brook any contradiction; it was a high-energy particle. A star exploded hundreds or thousands of years ago and ever since there's been a cosmic ray – a bad-magic bullet with my name on it, to quote Ken – heading towards the moment where it hit one of my cells and mutated it. That's an... 1 
notes
notesClaims it was a "cosmic ray." A poetic notion.
22 JUN 2012 by ideonexus
How Small are Atoms?
Why are atoms so small? ... Many examples have been devised to bring this fact home to an audience, none of them more impressive than the one used by Lord Kelvin: Suppose that you could mark the molecules in a glass of water, then pour the contents of the glass into the ocean and stir the latter thoroughly so as to distribute the marked molecules uniformly throughout the seven seas; if you then took a glass of water anywhere out of the ocean, you would find in it about a hundred of your marke...
1 So small that, if you were to pour a cup of water into the ocean and let it stir in, you could retrieve a cup of water from anywhere in the ocean that would contain 100 molecules from your cup.
11 JUN 2012 by ideonexus
Tiny Legs
But many of our imaginations and investigations of nature are futile, especially when we see little living animals and see their legs and must judge the same to be ten thousand times thinner than a hair of my beard, and when I see animals living that are more than a hundred times smaller and am unable to observe any legs at all, I still conclude from their structure and the movements of their bodies that they do have legs... and therefore legs in proportion to their bodies, just as is the cas... 1 notes
notesLeeuwenhoek observes that there are animals that move, but are too small to see their legs, but he knows they have legs and that those legs must somehow carry nutrients within them.
07 MAY 2012 by ideonexus
Molecules of Water and Air Passed Through Famous People
Take water. It's simple, common, and vital. There are more molecules of water in an eight-ounce cup of the stuff than there are cups of water in all the world's oceans. Every cup that passes through a single person and eventually rejoins the world's water supply holds enough molecules to mix fifteen hundred of them into every other cup of water in the world. No way around it: some of the water you just drank passed through the kidneys of Socrates, Genghis Khan, and Joan of Arc.
How about ai...Best explanation for why the H2O in a glass of water has molecules that passed through the kidneys of historical figures (even dinosaurs).
07 MAY 2012 by ideonexus
Losing the Human Perspective in the Vastness of the Cosmos
When I pause and reflect on our expanding universe, with its galaxies hurtling away from one another, embedded within the ever-stretching, four-dimensional fabric of space and time, sometimes I forget that uncounted people walk this Earth without food or shelter, and that children are disproportionately represented among them.
When I pore over the data that establish the mysterious presence of dark matter and dark energy throughout the universe, sometimes I forget that every day—every twe... 1 notes
notesTyson talks about how easy it is to forget human dilemmas when we consider the immense size of our Universe.
22 MAR 2012 by ideonexus
Decibel Scale is Logarithmic, Like the Richter Scale
In fact, a physics colleague, Mark Srednicki of U.C. Santa Barbara, brought to my attention a much greater gaffe in one episode, in which sound waves are used as a weapon against an orbiting ship. As if that weren't bad enough, the sound waves are said to reach “18 to the 12th power decibels.” What makes this particularly grate on the ear of a physicist is that the decibel scale is a logarithmic scale, like the Richter scale. This means that the number of decibels already represents a pow... 1 notes
notesKrauss describing a particularly egregious science-blunder in an episode of Star Trek.
06 JAN 2012 by ideonexus
Facts About the Hubble Ultra Deep Field
1.How faint are the farthest objects?
The Hubble observations detected objects as faint as 30th magnitude. The faintest objects the human eye can see are at sixth magnitude. Ground-based telescopes also can detect 30th-magnitude objects. Those objects, however, are so dim they are lost in the glare of brighter, nearby galaxies.
Searching for the faintest objects in the Ultra Deep Field is like trying to find a firefly on the Moon. Light from the farthest objects reached the Hubble teles...
1 Interesting factoids about the epic photo that illustrate the scale of the Universe.
06 JAN 2012 by ideonexus
Hubble Ultra Deep Field (UDF) photograph
Here we go again, one of the epic documents of our time, the Hubble Ultra Deep Field (UDF) photograph, the deepest look into space ever. A random part of the sky, so small it could be covered by a pinhead held at arm's length. A part of the sky -- as NASA says -- that you'd see looking through an eight-foot-long soda straw. A photo exposed over 400 orbits of the Hubble, a total exposure of 11.3 days. The telescope pointing precisely to the same point in space even as it whizzes around the Ear...It would take 12.7 million such photos to cover our night sky, and there are 10,000 galaxies in this image.
