In July 1994 the equivalent of more than 200,000 megatons of TNT was deposited in Jupiter’s upper atmosphere as comet Shoemaker-Levy 9 slammed into the planet. If that kind of collision happens on Earth while humanity is present, it would very likely result in the abrupt extinction of our species.
THAT IS BADASS.
"New technology developed by MIT and several other institutions could make it possible to track the position of nano particles as they move within the body or inside a cell."
The real problem with people fussing over Pluto all the time is it represents the priorities of the public - preserving traditions rather than accepting facts. The pursuit of science is about building a sustainable catalog of truths, and there is no advantage in altering truths to appease nostalgia.
Rhodium was isolated for the first time by English chemist Willaim Hyde Wollaston. During the process he created a solution of rhodium chloride, which has a very distinct rose colour. The element he then isolated from this solution he named Rhodium, from the Greek rodon = ‘rose.’
We had an old bottle of Rhodium standard solution in my old lab that had a very vibrant rose red colour to it
I remember seeing the photo above on Flickr once, and having my brain melt slightly from trying to figure out what went wrong.
The issue was the propeller was rotating as the camera detector ‘read out’, i.e. there was some motion during the exposure of the camera. This is an interesting thing to think about, lets have a look.
Many modern digital cameras use as their ‘sensing’ device a CMOS detector, also known as an active-pixel sensor, which works by accumulating electronic charge as light falls upon it. After a given amount of time, the exposure time, the charge is shifted row-by-row back to the camera for further processing. There is then a finite time where the camera scans down the image, saving rows of pixels at a time. If there is any motion over this timescale the image will be distorted.
Via A Mighty Girl:
Professional hacker Parisa Tabriz is responsible for keeping the nearly billion users of Google Chrome safe by finding vulnerabilities in their system before malicious hackers do. Tabriz, a “white hat” hacker who calls herself Google’s “Security Princess”, is head of the company’s information security engineering team. The 31-year-old Polish-Iranian-American is also an anomaly in Silicon Valley according to a recent profile in The Telegraph: “Not only is she a woman – a gender hugely under-represented in the booming tech industry – but she is a boss heading up a mostly male team of 30 experts in the US and Europe.”
Tabriz came up with “Security Princess” while at a conference and the unusual title is printed on her business card. “I knew I’d have to hand out my card and I thought Information Security Engineer sounded so boring,” she says. “Guys in the industry all take it so seriously, so security princess felt suitably whimsical.” Her curiosity, mischievousness, and innovative thinking are all assets in her business: a high-profile company like Google is constantly in the crosshairs of so-called “black hat” hackers.
Tabriz came into internet security almost by accident; at the University of Illinois’ computer engineering program, her interest was first whetted by the story of early hacker John Draper, who became known as Captain Crunch in the 1960s after he learned how to make free long-distance calls using a toy whistle from a Cap’n Crunch cereal box. She realized that, to beat the hackers of today, she had to be prepared for similar — but more advanced — out-of-the-box thinking.
While women at still very under-represented in the tech industry — Google recently reported that only 30% of its staff is female — Tabriz has hope for the future: “[F]ifty years ago there were similar percentages of women in medicine and law, now thankfully that’s shifted.” And, while she hasn’t encountered overt sexism at Google, when she was offered the position, at least one classmate said, “you know you only got it cos you’re a girl.” To help address this imbalance, she mentors under-16 students at a yearly computer science conference that teaches kids how to “hack for good” — and she especially encourages girls to pursue internet security work. One 16-year-old who attended, Trinity Nordstrom, says, “Parisa is a good role model, because of her I’d like to be a hacker.”
Tabriz, who was named by Forbes as one of the “top 30 under 30 to watch” in 2012, also wants the public to realize that hacking can be used for positive ends. “[H]acking can be ugly,” she says. “The guy who published the private photos of those celebrities online made headlines everywhere. What he did was not only a violation of these women but it was criminal, and as a hacker I was very saddened by it. I feel like we, the hackers, need better PR to show we’re not all like that… [A]fter all I’m in the business of protecting people.”
To read more about Google’s “Security Princess” in The Telegraph, visit http://bit.ly/Z6Z5RG
This beautiful jellyfish is the flower hat jelly. It’s a fierce predator in the west Pacific, and uses its tentacles to sting prey. When not in use, the tentacles coil up into its bell compartment, as seen here.