Study: Cold Water as Good as Hot for Washing Hands

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iStock

It’s one of those personal-care policies we don’t really think to question: Always wash your hands with hot water. It makes sense, as heat is typically considered an enemy of bacteria. The Food and Drug Administration even advises that food service kitchens should have handwashing stations with water temperatures between 38 and 42°C, or 100 and 108°F [PDF].

But according to a new study, we may be risking scalding our hands for very little payoff. Cold water may be just as effective for reducing the number of germs as hot water.

In a new report published in the Journal of Food Protection, staff at Rutgers University-New Brunswick looked at several variables in handwashing technique, including lather time, use of antibacterial soaps, and water temperature. A total of 20 volunteers washed their hands three times using water that was either 15, 26, or 38°C, with the process repeated 20 times over a six-month period. Each time, researchers looked for Escherichia coli before and after cleaning.

The result? There was no real difference in the reduction of E. coli between handwashings at 15°C (59°F) and 38°C (100°F). Participants got roughly the same amount of pathogens scrubbed off regardless of how hot the water got.

Instead of water temperature, the study’s results suggest you might want to pay closer attention to lather time. A 20-second scrub with regular soap was shown to be more effective in reducing germs than the baseline 5-second lather. This is in line with the Centers for Disease Control's guidelines, which recommend the same 20-second duration, or the time needed to hum “Happy Birthday” to yourself twice.

[h/t MedicalNewsToday]

Turn Your LEGO Bricks Into a Drone With the Flybrix Drone Kit

Flyxbrix/FatBrain
Flyxbrix/FatBrain

Now more than ever, it’s important to have a good hobby. Of course, a lot of people—maybe even you—have been obsessed with learning TikTok dances and baking sourdough bread for the last few months, but those hobbies can wear out their welcome pretty fast. So if you or someone you love is looking for something that’s a little more intellectually stimulating, you need to check out the Flybrix LEGO drone kit from Fat Brain Toys.

What is a Flybrix LEGO Drone Kit?

The Flybrix drone kit lets you build your own drones out of LEGO bricks and fly them around your house using your smartphone as a remote control (via Bluetooth). The kit itself comes with absolutely everything you need to start flying almost immediately, including a bag of 56-plus LEGO bricks, a LEGO figure pilot, eight quick-connect motors, eight propellers, a propeller wrench, a pre-programmed Flybrix flight board PCB, a USB data cord, a LiPo battery, and a USB LiPo battery charger. All you’ll have to do is download the Flybrix Configuration Software, the Bluetooth Flight Control App, and access online instructions and tutorials.

Experiment with your own designs.

The Flybrix LEGO drone kit is specifically designed to promote exploration and experimentation. All the components are tough and can totally withstand a few crash landings, so you can build and rebuild your own drones until you come up with the perfect design. Then you can do it all again. Try different motor arrangements, add your own LEGO bricks, experiment with different shapes—this kit is a wannabe engineer’s dream.

For the more advanced STEM learners out there, Flybrix lets you experiment with coding and block-based coding. It uses an arduino-based hackable circuit board, and the Flybrix app has advanced features that let you try your hand at software design.

Who is the Flybrix LEGO Drone Kit for?

Flybrix is a really fun way to introduce a number of core STEM concepts, which makes it ideal for kids—and technically, that’s who it was designed for. But because engineering and coding can get a little complicated, the recommended age for independent experimentation is 13 and up. However, kids younger than 13 can certainly work on Flybrix drones with the help of their parents. In fact, it actually makes a fantastic family hobby.

Ready to start building your own LEGO drones? Click here to order your Flybrix kit today for $198.

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7 Online Tech Course Programs That Will Help You Build New Career Skills

dusanpetkovic/iStock via Getty Images Plus
dusanpetkovic/iStock via Getty Images Plus

It's always a good time to build new career skills, and with these tech-related courses, you can learn anything from the basics of Python to the ins and outs of G Suite. These courses will boost your knowledge of the digital world and help you put some valuable new bullet points on your resume. Many of these courses allow you to read through the materials for free, but if you want to take advantage of graded coursework and earn a certificate of completion to include on your LinkedIn profile or resume at the end, there will be a fee of anywhere from $39 to $49.

1. UI/UX Design Specialization

In this four-class specialization on UI/UX design, you’ll discover how to design digital experiences that users can navigate with ease. Over about four months, you’ll learn the basics of visual communication and you’ll be able to practice gathering user feedback to build intuitive, attractive websites and interfaces.

Sign up on Coursera to take all four courses in this specialization for $49 a month.

2. Python for Everybody

Python is quickly gaining ground as one of the most in-demand programming languages for employers. Plus, its fans say it’s highly readable and approachable for new programmers just starting to learn a coding language. If you want to understand the basics of Python, from 101 principles to more advanced database design, these courses will get you started.

Sign up on Coursera to take all five courses in this specialization for $49 a month.

3. Data Science Professional Certificate

Data science is one of the fastest growing professions in the U.S., according to the Bureau of Labor Statistics. In this nine-course professional certificate program, you’ll start by learning basic data science methodology before moving into how to use Python and SQL to analyze and visualize data to forecast future trends. IBM estimates that you’ll complete the entire certificate in about 10 months if you commit four hours per week, but the timing is flexible enough to suit any schedule.

Sign up on Coursera to take all nine courses in this specialization for $39 a month.

4. Computer Architecture

This course, taught by an electrical engineering professor at Princeton, teaches students how to design computer hardware that supports powerful software. But be forewarned: This is an advanced class intended for students with extensive knowledge in computer science. If you’re looking for a beginner-level course, this class—also from Princeton—may be a better fit.

Sign up on Coursera for free.

5. AI for Everyone

If you’re worried that artificial intelligence will drive you out of the workforce, this course will help. Over the course of four weeks, you’ll learn the basics of what is and isn’t possible through AI—and you may even gain some ideas for how to use AI to augment your own career.

Sign up on Coursera for $49.

6. G Suite Administration Specialization

Become a Google Cloud expert with this series of courses put together by Google itself. Over about two months, you’ll learn management tactics and security guidelines for using Gmail, Google Drive, Google Docs, and Calendar. This specialization prepares participants to become G Suite administrators at their respective companies and organizations.

Sign up on Coursera to take all five courses in this specialization for $49 a month.

7. Introduction to Cloud Computing

Cloud computing is near the top of the list of skills employers are looking for, according to LinkedIn. In this introductory course, you’ll gain a basic understanding of cloud-based networks and get some practice working with IBM Cloud.

Sign up on Coursera for $49.

At Mental Floss, we only write about the products we love and want to share with our readers, so all products are chosen independently by our editors. Mental Floss has affiliate relationships with certain retailers and may receive a percentage of any sale made from the links on this page. Prices and availability are accurate as of the time of publication.