Leap year: An imperfect science explained (video)

leap-year-Morgan Lane Photography Shutterstock

Today is February 29, that special extra day that comes just once every four years. As many of you likely already know, this added day is the result of some inconvenient math. Namely, a full Earth year — the time it takes for our planet to make one full trip around the sun — is about six hours more than the 365 days we observe on the calendar. To make up for this, we add in an extra day every four years (6 hours x 4 = 24 hours, or 1 full day). Now, you might think that that’s the end of it. But it’s not even close.

The math behind the Gregorian calendar is far more complex, and not nearly as perfect as one would expect. This pesky truth is explained by professional speaker and “time management expert” C.G.P. Grey, whose latest YouTube video explains the sheer madness behind our calendar imperfections. Check it out below:

[Image via Morgan Lane Photography/Shutterstock]

Emerging Tech

Awesome Tech You Can’t Buy Yet: 1-handed drone control, a pot that stirs itself

Check out our roundup of the best new crowdfunding projects and product announcements that hit the web this week. You may not be able to buy this stuff yet, but it sure is fun to gawk!
Smart Home

Hosting Thanksgiving but not sure where to begin? Try a Thanksgiving meal kit

Need a Thanksgiving meal, but short on time or expertise? Here are the best Thanksgiving meal kits to help you out. They either give you all the ingredients and instructions, or provide a full Thanksgiving meal that you just have to heat.
Movies & TV

The best shows on Netflix, from 'The Haunting of Hill House’ to ‘The Good Place’

Looking for a new show to binge? Lucky for you, we've curated a list of the best shows on Netflix, whether you're a fan of outlandish anime, dramatic period pieces, or shows that leave you questioning what lies beyond.
Home Theater

Time for a TV upgrade? Here’s what you need to know about 4K Ultra HD TV

Ultra HD 4K has quickly taken over the world of TVs. But what is Ultra HD 4K, how does it work, and most importantly, should you upgrade, or keep your old TV? We explain it all right here.
Photography

Get your Sagan on with 60 awe-inspiring photos of the final frontier

Few things instill a sense of wonder quite like the final frontier. The best space photos show off the beauty of Earth, our solar system, and the far corners of the universe. Here are our current favorites.
Deals

Cyber Monday 2018: When it takes place and where to find the best deals

Cyber Monday is still a ways off, but it's never too early to start planning ahead. With so many different deals to choose from during one of the biggest shopping holidays of the year, going in with a little know-how makes all the…
Product Review

Airselfie 2 may as well be a GoPro stapled to a drunk hummingbird

On paper, the Airselfie 2 is marketed as flying photographer that fits in your pocket and snaps selfies from the sky. Unfortunately it’s more like a HandiCam controlled by a swarm of intoxicated bumblebees
Emerging Tech

‘Bionic mushroom’ can generate electricity without using fossil fuels

Researchers have come up with a way to produce electricity without fossil fuels using mushrooms covered with bacteria. The mushroom provides a safe environment for special cyanobacteria that generate electricity when light is shone on them.
Emerging Tech

Curiosity rover active and drilling again after computer issue

The Curiosity rover has succeeded in drilling a hole into the tough bedrock that previously defeated it, allowing imaging and collection of samples. The rover had been incapacitated for a few weeks due to problems with its computer.
Emerging Tech

Astronomers discover two rogue planets that do not orbit a star

Astronomers have identified two rogue planets in our galaxy which do not orbit around a star. Unlike the vast majority of discovered planets, these rogue planets drift through space alone with no sun to shine on them.
Emerging Tech

Pairs of supermassive black holes spotted in colliding galaxies

Astronomers have discovered several pairs of supermassive black holes in galaxies that are colliding with each other. These black holes will spiral closer and closer together and eventually merge into one supermassive black hole.
Emerging Tech

Quantum-based accelerometer can locate objects without GPS

Researchers have created a quantum "compass" that allows navigation without satellites. The instrument, technically called a standalone quantum accelerometer, is small enough to be transportable and has a very high level of accuracy.
Emerging Tech

Ancient continent discovered beneath the ice of Antarctica

Antarctica could be hiding the remains of a long-lost continent. Scientists created a 3D map of the crust beneath the Antarctic ice sheet which shows a similarity to the crust in Australia and India, suggesting they used to be joined.
Emerging Tech

Rocket Lab steps into spotlight with its first commercial rocket launch

Rocket Lab has deployed multiple small satellites into orbit in its first notable commercial launch. Its New Zealand-born boss said the success means "rapid and reliable access to space is now a reality for small satellites."