Technologies

How Mark Rober’s DNA Nerf Guns Could Lead to Medical Breakthroughs

Mark Rober explains his yearlong odyssey to break the record for world’s smallest Nerf gun five times, culminating in ones made out of DNA.

When Mark Rober set out to break the record for world’s smallest Nerf gun, he never expected he’d end up making more mini Nerf guns than the total number of actual Nerf guns ever to exist.

In his yearlong mission, Rober ended up breaking the record five times by collaborating with leading experts and employing different engineering techniques.

His first few batches of mini Nerf blasters were made possible by drastically simplifying the design of the Nerf gun. «All materials are springs, even glass,» Rober told CNET in an interview. «You just take advantage of that springiness [to] build all the hinges and the springs into one part.»

This one-part design broke the record a few times but eventually reached its limits. At 1,000 times smaller than a standard Nerf gun, about the perfect size for an ant, the mini Nerf guns were still able to fire. They had to be fired with a micro-manipulator, however, since human hands and tweezers would not be precise enough to do the job.

Beyond that, Rober says a fireable Nerf gun «could be done,» but that the tools required were so expensive as to put it beyond the scope of his video.

Despite no longer being fireable, Rober kept going smaller, in part to protect this particular record from his friend and rival in world-record breaking shenanigans, YouTuber Jimmy Donaldson, aka Mr. Beast.

Before wrapping up his video, Rober learned of a technique called DNA origami being studied at the Salk Institute and decided to make one last batch of nano Nerf guns.

This technique takes advantage of the fact that DNA naturally binds up when complementary strands are placed in solution together to build out specific shapes. In this case, the right DNA strands placed in the right temperature solution for the right length of time produced trillions of nano Nerf guns.

At 100 nanometers in length, they’re smaller than the wavelength of visible light, so «light can’t even bounce off them to get back to your eye.» Rober explained that in order to view their creations, they needed the help of an atomic force microscope.

The technology behind these record-shattering mini Nerf guns could also be applied to medical breakthroughs. Rober explains that DNA origami techniques might be used someday to hack the human body’s biological mechanisms. For example, he says, «if you had 1.2 trillion mini Nerf guns that instead of firing darts were firing something … to kill a bad cell, cancer or fortify a good cell.»

To see our full interview with Rober about his record-breaking nano Nerf guns, check out the video in this article.

Technologies

Today’s NYT Mini Crossword Answers for Saturday, Dec. 27

Here are the answers for The New York Times Mini Crossword for Dec. 27.

Looking for the most recent Mini Crossword answer? Click here for today’s Mini Crossword hints, as well as our daily answers and hints for The New York Times Wordle, Strands, Connections and Connections: Sports Edition puzzles.

Need some help with today’s Mini Crossword? It’s pretty long for a Mini Crossword, and some of the clues are tricky. The answer to 10-Across is not an expression I use, for sure. Read on. And if you could use some hints and guidance for daily solving, check out our Mini Crossword tips.

If you’re looking for today’s Wordle, Connections, Connections: Sports Edition and Strands answers, you can visit CNET’s NYT puzzle hints page.

Read more: Tips and Tricks for Solving The New York Times Mini Crossword

Let’s get to those Mini Crossword clues and answers.

Mini across clues and answers

1A clue: Fashionable
Answer: HIP

4A clue: Product sold on «The Office»
Answer: PAPER

6A clue: One writing a performance review
Answer: MANAGER

8A clue: With 5-Down, redundant synonym of «outcome»
Answer: END

9A clue: Quiet ___ mouse
Answer: ASA

10A clue: Gives constant compliments, in slang
Answer: GASESUP

12A clue: Ski mountain bump
Answer: MOGUL

13A clue: Uneasy feeling
Answer: ANGST

Mini down clues and answers

1D clue: Personally involved
Answer: HANDSON

2D clue: Hoppy beer, for short
Answer: IPA

3D clue: Mythical horse whose name is an anagram of 10-Across
Answer: PEGASUS

4D clue: Last word in the palindromic sentence «A man, a plan, a canal …»
Answer: PANAMA

5D clue: See 8-Across
Answer: RESULT

6D clue: Ryan of «When Harry Met Sally …»
Answer: MEG

7D clue: Genre for Playboi Carti and Cardi B
Answer: RAP

11D clue: Something in an Easter basket
Answer: EGG

Don’t miss any of our unbiased tech content and lab-based reviews. Add CNET as a preferred Google source.

Technologies

Today’s NYT Connections: Sports Edition Hints and Answers for Dec. 27, #460

Here are hints and the answers for the NYT Connections: Sports Edition puzzle for Dec. 27, No. 460.

Looking for the most recent regular Connections answers? Click here for today’s Connections hints, as well as our daily answers and hints for The New York Times Mini Crossword, Wordle and Strands puzzles.

Today’s Connections: Sports Edition is a real challenge. That purple category wants you to hunt out something related in four different words, and it’s a toughie. If you’re struggling with today’s puzzle but still want to solve it, read on for hints and the answers.

Connections: Sports Edition is published by The Athletic, the subscription-based sports journalism site owned by The Times. It doesn’t appear in the NYT Games app, but it does in The Athletic’s own app. Or you can play it for free online.

Read more: NYT Connections: Sports Edition Puzzle Comes Out of Beta

Hints for today’s Connections: Sports Edition groups

Here are four hints for the groupings in today’s Connections: Sports Edition puzzle, ranked from the easiest yellow group to the tough (and sometimes bizarre) purple group.

Yellow group hint: Something you save.

Green group hint: An Olympic sport.

Blue group hint: Toronto pitchers.

Purple group hint: Think about the alphabet and look for something hidden.

Answers for today’s Connections: Sports Edition groups

Yellow group: Memento.

Green group: Types of wrestling.

Blue group: Blue Jays to win Cy Young Award.

Purple group: Ends in a homophone for a letter of the alphabet.

Read more: Wordle Cheat Sheet: Here Are the Most Popular Letters Used in English Words

What are today’s Connections: Sports Edition answers?

The yellow words in today’s Connections

The theme is memento. The four answers are collectible, keepsake, memorabilia and souvenir.

The green words in today’s Connections

The theme is types of wrestling. The four answers are arm, freestyle, Greco-Roman and sumo.

The blue words in today’s Connections

The theme is Blue Jays to win Cy Young Award. The four answers are Clemens, Halladay, Hentgen and Ray.

The purple words in today’s Connections

The theme is ends in a homophone for a letter of the alphabet. The four answers are batter’s eye (I), blue jay (J), golf tee (T) and pool cue (Q).

Don’t miss any of our unbiased tech content and lab-based reviews. Add CNET as a preferred Google source.

Technologies

Today’s Wordle Hints, Answer and Help for Dec. 27, #1,652

Here are hints and the answer for today’s Wordle for Dec. 27, No. 1,652.

Looking for the most recent Wordle answer? Click here for today’s Wordle hints, as well as our daily answers and hints for The New York Times Mini Crossword, Connections, Connections: Sports Edition and Strands puzzles.

Today’s Wordle puzzle came together pretty quickly for me this time. If you need a new starter word, check out our list of which letters show up the most in English words. If you need hints and the answer, read on.