How Many Times Can You Thaw and Refreeze Meat?

But before we jump into that, let’s talk about what we mean by thawing the meat properly. It’s important that food be kept at a safe temperature while thawing. If the food becomes warmer than 40° F, bacteria may begin to proliferate, according to the Department of Agriculture.  So don’t do what I’ve done before,…

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Talking Cars 444: Driving the Refreshed Tesla Model 3

Main theme: This podcast focuses on our first impressions of the refreshed 2024 Tesla Model 3. Tesla doesn’t make big revisions to its vehicles very often, tending to implement incremental updates instead. But the Model 3—Tesla’s second-most-popular offering, behind the Model Y—has remained nearly unchanged since it came out in 2017. That means this 2024…

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Best Portable Air Conditioners of 2024

In our portable air conditioner tests, we measure how long it takes a unit to lower the temperature of a test chamber from 90° F to 85° F. That takes an average of 20 minutes. By comparison, the best window air conditioners can cool the room by 10° F in about 15 minutes or less….

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Best Patio Coolers

Patio coolers are larger-capacity coolers on wheels that can be kept outside throughout the summer season. CR already reviewed small coolers and wine fridges and regularly tests full-sized refrigerators, so we decided to evaluate outdoor cooler carts, too. After setting them up in our lab to record the temperature inside each cooler for 26 hours,…

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Trump’s Day One Executive Orders Will Worsen Climate Crisis

On his first day in office, President Trump has signed a slew of executive orders that will set the United States on a radically different environmental path from the Biden administration. The executive orders and memoranda take the first steps to fulfilling many of Trump’s promises from the campaign trail: Withdrawing the US from the…

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Apple Engineers Show How Flimsy AI ‘Reasoning’ Can Be

For a while now, companies like OpenAI and Google have been touting advanced “reasoning” capabilities as the next big step in their latest artificial intelligence models. Now, though, a new study from six Apple engineers shows that the mathematical “reasoning” displayed by advanced large language models can be extremely brittle and unreliable in the face…

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Best Ways to Relieve Back Pain

If you sometimes need more relief, over-the-counter anti-inflammatories such as ibuprofen (Advil and generic) can be the first choice, according to ACP guidelines. But they often aren’t appropriate for older adults, who may be at a higher risk of side effects such as gastrointestinal bleeding, says Jesse Charnoff, MD, a physiatrist at the Hospital for…

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The Search for the Face Behind Mavis Beacon Teaches Typing

Jazmin Jones knows what she did. “If you’re online, there’s this idea of trolling,” Jones, the director behind Seeking Mavis Beacon, said during a recent panel for her new documentary. “For this project, some things we’re taking incredibly seriously … and other things we’re trolling. We’re trolling this idea of a detective because we’re also,…

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Best Space Heaters for a Home Office

Before you buy, decide whether you want the space heater to heat just you or warm up the whole room. Our tests found that not all models do both well. When we test space heaters, we evaluate how high they raise the temperature in a standard-sized room (17×12 feet) in 15 minutes and how well…

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