A caffeine calculator

Coffee contains an average of 15mg of caffeine per fluid ounce

Coffee has three times the amount of caffeine contained in most caffeinated sodas, but significantly less than espresso and cocoa powder.

Coffee is, generally, good for your health

While overconsumption certainly has its drawbacks—hello, not sleeping until the sun rises—on the whole, coffee is fine, even beneficial, for your health. It can even help prevent serious health conditions, like heart attacks and liver cancer.

See how much daily sugar substitute intake the FDA considers to be safe

The agency states in this PDF graphic that a person weighing about 132 pounds would have to consume roughly a couple dozen sweetener packets daily—or more—to reach unsafe levels of consumption. The accumulated consumption would be across all sources, including diet beverages, sugar-free candies, and actual packets added to coffee.

Explore this interactive tool from the National Cancer Institute to calculate your risk of dying from various causes, including cancer.

Up to 400 milligrams of caffeine a day is considered safe

Small, frequent doses can be more effective than large amounts, though caffeine can raise blood pressure and heart rate, especially in people with hypertension. While low doses of caffeine may help with depression by stimulating dopamine, excessive caffeine, particularly from energy drinks, can lead to anxiety and heart issues.

Coffee is addictive, and those going through withdrawal often experience headaches and fatigue.

Chocolate can be deadly in humans, but only after consuming extraordinary quantities

Based on tests with mice, the lethal dose of chocolate is estimated to be no more than 1,000 mg/kg. This means that the lethal dose of dark chocolate for the average US adult is about 6.5 kilograms (14.33 pounds), or about 8,300 Hershey's kisses, in one sitting.

Coffee gives you energy, but it ultimately makes you more tired

The caffeine in coffee delays your brain's fatigue signals. Caffeine blocks adenosine, a compound that builds up as you burn energy and signals rest. Once caffeine wears off, adenosine floods back, leaving you even more tired.

The American Heart Association says adults can safely drink up to five cups of coffee per day and regular consumption may improve cardiovascular health.

Understand distinctions between coffee types and other popular cafe beverages with this visual guide.

Explore the complex relationship between calories and weight

What if you found out that weight loss is actually much more complex than "calories in, calories out" and that the 2,000 calorie-a-day recommendation may not actually be accurate?

The WHO labeled aspartame as 'possibly carcinogenic' but US regulators consider it safe

The International Agency for Research on Cancer, an arm of the World Health Organization, labeled aspartame—the artificial sweetener in Diet Coke—as one of several hundred possible cancer-causing substances in 2023. The determination was based on animal and human studies and "limited" evidence linking it to liver cancer. The WHO and US Food and Drug Administration both say the substance is safe at moderate levels. The FDA says a person weighing about 132 pounds would need to have 75 packets daily to reach an unsafe level.

Your DNA may determine whether you like coffee or tea

Whether people prefer coffee or tea may boil down to a matter of taste genetics. People with a version of a gene that increases sensitivity to the bitter flavor of caffeine tend to be coffee drinkers, according to a report. Read on for more.

Calculate your estimated yearly dose of ionizing radiation

This calculator from the EPA provides a value in millirems—the US unit for effective dose—based on a variety of exposure parameters, including the state a user lives in and travel-related sources of ionizing radiation, such as passing through screening machines.

Grip strength, how firmly and securely you can hold onto things, predicts death better than blood pressure

'Blackout challenge' can cause brain damage or death in under 5 minutes

A social media trend that encourages viewers to asphyxiate themselves until they lose consciousness in the hopes of feeling "high" or euphoric has garnered the interest of teens and adolescents, with dangerous results. Variations of this deadly challenge have been adolescent trends every few years.

Different brewing methods require different grinding methods

With so many brewing methods—AeroPress, Moka Pot, and French press to name a few—knowing the right grind size for your coffee beans is essential. Danish coffee expert Asser Christensen, also known as the Coffee Chronicler, explains how grinding works and recommends the best grind choice for different coffee makers.

Cultivate your coffee taste with this interactive flavor wheel

Coffee is one of the more complex things humans consume, and taste can vary drastically based on bean genetics, roasting technique, and more. Using this flavor wheel, you can more accurately describe your coffee's aroma by starting from the center and moving outward.

A life insurance cost calculator

The overall cost of life insurance coverage ranges widely. Factors like your term length, death benefit (the money paid out after death), health and lifestyle, and any added benefits can drastically change your monthly cost. This calculator can help you determine how much your desired coverage could run you per month.

Overwork contributes to thousands of worker deaths

Can work really kill you? The World Health Organization and the International Labor Organization have estimated that long work hours contribute to thousands of death from strokes and heart attacks each year. This BBC article argues that the culture of overwork and burnout is leading to a public health crisis in desperate need of solutions.

Distinct plant species evolved to produce caffeine as a pesticide

Although it provides a defense against insects trying to eat caffeine-bearing plants, the molecule is an example of exaptation, where its original function was repurposed over time. Studies show that some plants now produce caffeine-laced nectar to help pollinators move more quickly and pollinate more efficiently.

The impact of gravitational force on our bodies surprised early coaster riders and engineers

There is only a certain amount of gravitational force that the body can handle before dealing with consequences like short-term vision loss or unconsciousness. Increased scientific understanding has largely reduced these impacts, with engineers combining periods of intense pressure with periods of relief.

Recent global health estimates suggest that inactivity is a leading risk factor for death, contributing to 6% of deaths worldwide.

The history of coffee

From its likely origins in what is now Ethiopia to today's worldwide consumption, this video uses a map to show how coffee conquered the world. Follow along and see how pilgrimages and centuries of trade influenced the spread of the beverage we all know so well.

Use a CD rate calculator

This CD Rate Calculator allows you to determine your interest earnings and total savings balance at CD maturity. Enter your initial deposit, your interest rate, and your term length in months or years. Click here to use it.

Memento Movi

Have you ever wanted life to be a little more like a movie? This somewhat absurd website shows you how far along you are in life, if your life was an actual film. Enter your birthday, how long you expect to live (using your best judgment!), and pick a film. The site will show you where you are in life—if your life was, say, "Inception" or "Wicked." A little silly, we know.

Why death is caused by a dearth of ATP

Though people die from many causes, this video makes the case that a lack of adenosine triphosphate production in the body is what kills almost all of us. Without ATP, physiological processes grind to a halt, and organs stop functioning.

The medieval influencer who convinced people to drink tea

This article explains how the world shifted from mostly eating tea, whether as leaves to be chewed or caffeinated soup to be slurped, to drinking it. Lu Yu's first exposure to tea in the 700s didn't go so well, with him reviewing the concoction as...

See how sugar stacks up against the sweetness of sugar alternatives, which can sometimes be hundreds of times sweeter than their sugar counterparts.

Bees are more likely to remember a flower if its nectar contains caffeine

Plants want pollinators to keep coming back, so the finding suggests that some plants, such as Citrus and Coffea species, have evolved to include caffeine in their nectar. Researchers suggest the findings could help develop methods to reinvigorate pollinator populations.

Calculate the financial outlook for your retirement

This simple calculator takes your age, income, planned contributions, and expected retirement needs into account to give you a portrait of how your financial condition will look when it comes time to start withdrawals.

Mortality tables help determine the probability of death for specific populations

A mortality table is a diagram that helps predict a specific population’s likelihood of death within a particular time period. Life insurance companies often use them to help figure out pricing for their insurance products. They’re sometimes known as actuarial tables or life tables.

How does cancer actually kill someone?

While the emotional and physical tolls of cancer are often clear, the innerworkings of how cancer kills can be confusing — and terrifying to discuss. Here, oncologists explain how cancer can progress.

The myth of sugar rushes vs. the reality of sugar crashes

It's generally accepted that sugar rushes are a myth, and that hyperactivity is a more psychological experience. However, there is real science behind the rare sugar crash that primarily impacts those with diabetes. Read this article to understand how historical and cultural factors have shaped sugar perceptions, and how low blood sugar can trigger shakiness, fatigue, weakness, and more in diabetes patients.

Explore global maps of cancer prevalence, with incidences that reflect various risk factors, including smoking rates, HPV infections, sunscreen use, and alcohol consumption.

A 101 on the 'Death Cap,' the world's deadliest mushroom

The Death Cap, also known as amanita phalloides, is the most fatal mushroom on the planet, responsible for roughly 90% of the world's mushroom deaths per year. Ingestion of the mushroom wreaks havoc on the liver and kidneys, frequently leading to...

A wedding cost calculator

Want to know how much your wedding will cost? Simply enter your wedding date, location, and a few more details about your wedding plans, and this tool will spit out an estimate for how much it will all cost—with details on how each estimate was figured, from a wedding dress or tux to ordering the cake. If you're planning a wedding soon (or just dreaming about planning one), explore this wedding cost generator.

Before it was a drink, coffee was used for handwashing.

A cup of coffee on Earth contains about 100 proton masses worth of dark matter

The estimate is based on Earth's location within the Milky Way and the dark matter cloud it resides in. Because scientists do not know the nature of dark matter, the mass may be accounted for with any number of dark matter particles of varying mass.

Kava, kratom, St. John's Wort, and green tea extract present health concerns

Consumer Reports, which tests supplements for safety, urges consumers to avoid these four supplements due to safety warnings from researchers and public health authorities.

Drugs 101: An interactive guide

What's the difference between opioids and psychedelics? This guide details specific drugs and their various associated effects. Drugs in this wheel fall into seven categories: stimulants, depressants, empathogens, psychedelics, dissociatives, cannabinoids, and opioids.

Determine your carbon footprint using the Environmental Protection Agency's Carbon Footprint Calculator, which incorporates various emission factors involving home energy, transportation, and water production.

Heatstroke deaths may be massively undercounted—perhaps by a factor of 10

One often-cited average estimate of annual American heat deaths—roughly 1,200 per year—is based on death certificate data, but it may be a significant undercount because heat kills through cardiovascular, kidney, and respiratory causes that are more likely to be cited on those documents. (Separate analysis that looked at data from 1999 to 2023 found that the highest number, in 2023, was 2325.)

Fentanyl can be up to 100 times more potent than morphine

A synthetic opioid, fentanyl is highly addictive and incredibly fast-acting—a fatal dose is equal to a few grains of table salt. Once it enters the body, fentanyl floods naturally occurring opioid receptors, which can cause the body to shut down its breathing reflex, leading to a fatal overdose.

Use this tool to calculate the dollar value of your parental mental load, from meal planning to coordinating after-school care, then see resources that help generate solutions.

Can fasting help you live longer?

Animal studies into the health benefits of calorie restrictions of 20%-40% suggest it extends life spans and reduces incidents of age-related diseases, including cancer. This article explores the research into fasting, calorie restriction, and longevity.

This site sums up your entire life in statistics

If you’re able to read this statement, a lot has happened since you were born…and these statistics summarize what you have lived through! Input your birthday to find out about how many times your heart has beaten, how many breaths you’ve...

What it's like to live with insomnia

The biological process Shakespeare referred to as the chief nourisher of life's feast is necessary for the body and mind to rest and repair from the activities of daily life. As sleep evades the exhausted, sufferers also lose emotional stability, mental clarity, social connections, and more while simultaneously gaining waves of interrupted biological processes that can lead to disease and death.

Counting calories with a ballerina

Ballet dancer Theresa Farrell meticulously manages her diet to achieve her performance weight goal for the American Contemporary Ballet season in Los Angeles. She tracks calories, relies on pre-packaged meals, and calculates every intake. This regimen allows her to stay focused on training and rigorous dance routines, ensuring she's prepared physically for performances. Watch a day in the life here.

Explore how to safely start 'strengthmaxxing' with body weight—not actual weights.