Category Archives: Science

The Causation-Correlation Conflation

Not equal signThe question of cause  has haunted science and philosophy from their earliest days, in part because humans are wired for pattern-matching and confirmation bias. For all our supposed rationality, we confuse coincidence with correlation and correlation with causality.

Consequently, scientists must carefully design and control their experiments to remove bias, circular reasoning, self-fulfilling prophecies and hidden variables. They must respect the requirements and limitations of their methods, draw from representative samples and not overstate their results. Sometimes, however, that’s easier said than done. Read on to hear about…

10 Correlations that are Not Causations

Tracking 2013’s Tastiest Tech

Detail of Google Glass
Photo by Antonio Zugaldia

Looking back on the tech trends, triumphs and tribulation of 2013, a few patterns emerge: Private projects took off even while privacy took a beating; robots and AI servants made great strides while their drone cousins stalked us with cameras and weapons; reality was simultaneously augmented and scrutinized, while 3-D-printing and private-sector space races seemingly brought the whole world into the realm of DIY.

2013’s Biggest Tech Moments

Laser Communications Gets a Zap(pa) from Moon Unit

Photo by ESO Photo Ambassador Yuri Beletsky. Unrelated to the NASA experiment but cool nonetheless.

Lasers rank among the most vital and widespread technologies in the industrialized world, but for years they were considered a solution looking for a problem. One possible application lay in communications: Lasers, being of higher frequency and energy than radio, held the potential to communicate more information per second.

Fast-forward to October 2013, when NASA pulled off one of the most impressive proofs-of-concept in history. That month, a spacecraft orbiting the moon sent data 239,000 miles to Earth via a pulsed laser beam at a download rate of 622 megabits per second (by comparison, high-speed consumer data plans are usually measured in the tens of megabits). Everyone from cryptographers to high-speed Wall Street traders sat up and took notice. Sound cool? Read on as I explain…

How Laser Communication Works

Like a Bridge Under Troubled Waters

A partially disassembled tunnel boring machine (TBM)
A partially disassembled tunnel boring machine (TBM). Photo by Mike.

Between the years of 1825 and 1843 , through floods and financial failures, Marc Isambard Brunel and his son dug a tunnel under London’s Thames River. Our ambitions have grown since then, but the technology we use still bears a striking resemblance to Brunel’s shipworm-inspired device.

In this article, I look at some of the worlds most breathtaking underwater tunnels and delve into how they were constructed.

How do you build an underwater tunnel?

Going the Extra Mile (on the Same Tank of Gas)

Photo of a gas price sign.
Photo by Ildar Sagdejev

Call it ecodriving, hypermiling or plain old frugality, people today are trying every trick they can think of to wring a few extra miles from a drop of gas. Unfortunately, most fuel-saving tips range from the dubious to the downright dimwitted. Even the ones that work — such as making only right turns — veer into the ridiculous. In this Top 5 list, I’ve separated the classics from the clunkers and saved you the trouble of doing your own Mythbusters episode. Read on to discover….

Everyday Driving Tips to Save Fuel