In the digital world, almost everything you do to communicate leaves a trace. Often, emails are stored on servers even after they're deleted. Phone calls create logs detailing which numbers connected, when and for how long. Your mobile phone can create a record of where you are.
If you're a journalist trying to protect a confidential source, this is a very difficult world to work in.
Ancient North Americans gouged elaborate rock art into a heap of big boulders northeast of Reno, Nev., more than 10,000 years ago and perhaps 15,000 years ago. That makes the carvings the oldest known petroglyphs on the continent, according to a paper published in the Journal of Archaeological Science.
Originally published on Fri August 16, 2013 2:24 pm
Each Friday we round up the big conversations in tech and culture during the week that was. We also revisit the work that appeared on this blog, and highlight what we're reading from our fellow technology writers and observers at other organizations.
Performance artist Marina Abramovic's piece Measuring the Magic of Mutual Gaze is both art installation and science experiment, in which volunteers sit facing one another while having their brain waves measured. Abramovic discusses these arts and science experiments with neuroscientist Christof Koch, an expert in consciousness.
Across the Southwest, cities are banning water-thirsty front lawns. Cado Daily of the University of Arizona's Water Wise Program views that as an opportunity to plant a "rainscape" — a yard with drought-friendly native plants that she says can look as lush as a lawn, and lure wildlife back, too.
The number of girls and women studying the sciences has steadily increased each year, but there is still a gender gap in higher education and the work force. Researchers Andresse St. Rose and Catherine Riegle-Crumb and Linda Kekelis, executive director of Techbridge, discuss the social and environmental factors that contribute to this disparity.
Ten years ago this week, a massive electrical blackout struck the northeastern US and parts of Canada, affecting some 55 million people. IEEE Spectrum journalist Bill Sweet describes the causes of the outage and how the electrical grid has changed since the 2003 failure.
Elon Musk, founder of SpaceX and Tesla Motors, unveiled his designs for Hyperloop. The high-speed transit system could make the 400-mile trip from San Francisco and Los Angeles in 30 minutes. Tim De Chant, senior digital editor at NOVA, discusses the plans and whether the system could answer our transit problems.
Originally published on Fri August 16, 2013 3:27 pm
After several months of freeze-dried food, even the most committed carnivores would probably reach for the fresh produce.
So it's no surprise that the six explorers who were cooped up studying space-friendly foods on a simulated mission to Mars for the past four months went right for the mangoes and pineapple during their first meal outside their habitat Aug. 13.