No menu items!

COSTA RICA'S LEADING ENGLISH LANGUAGE NEWSPAPER

HomeTopicsArts and Culture5 Surprising Facts About the Science of Coffee

5 Surprising Facts About the Science of Coffee

Coffee continues to be getting more popular by the day and I have some incredible facts about it that you might not have heard of. If you have ever wanted to be a master of coffee trivia, you’ve come to the right place.

Scientists in Costa Rica and around the world work tirelessly to uncover the mysteries of the natural world, from the reasons people binge to the best way to wash hands. Recently it was revealed that they’ve figured out why coffee served in white mugs tastes so bitter. (The contrast between the color of coffee and a white mug makes the joe look and taste bolder.) Coffee served in clear glass mugs tastes sweeter.

So, yes, those lab rats (the people, not the animals) are obsessed with getting (and studying) that jolt of java. That study got us thinking: What other crazy things do we know about coffee thanks to science? Answer: a lot.

A list of 5 surprising facts about the science of coffee.

1. The optimal temperature

Researchers at the University of Texas at Tyler were tired of making coffee, taking a sip and burning off a layer of taste buds because the brew was scalding. So they got 300 volunteers to determine what temperature makes coffee drinkable but not mouth-burning. Those brave test subjects found that the sweet spot is 136 degrees.

2. The best time to drink coffee

We’ve been conditioned to get our caffeine fix first thing in the morning. But as Steven Miller, a psychology professor at Rosalind Franklin University in the U.S. state of Illinois, points out, early mornings are probably the worst time to drink coffee.

If we pay attention to our circadian rhythms, specifically the points when our cortisol levels (responsible for the magical way we naturally feel alert) are low, we should drink coffee in the late morning (9:30 to 11:30 a.m.) and during the afternoon slump (1 to 5 p.m.).

3. The coffee-ring effect

Spill coffee on your shirt, and when it dries, the stain looks a little like a tree stump: light on the inside, dark around the edge. Scientists at the University of Pennsylvania spent more than a decade determining what causes those outer rings. The culprit: the shape of the coffee particles. Round particles form a defined outer ring, while elongated ones do not.

4. A coffee a day keeps the ringing at bay

If we’re being technical, it may be four cups of coffee a day. A study tracked the incidence of tinnitus (a constant ringing in the ear) among 65,000 U.S. women over 18 years. Those who had less than one cup of coffee a day were 15 percent more likely to have tinnitus than those who had four or more.

5. Try a coffee nap

Coffee and naps don’t seem like a natural duo: One would think that the stimulative effects of coffee should stop you from dozing off. But the boost of energy you get from a cup of coffee doesn’t happen in an instant: It takes upward of 20 minutes for the caffeine to be absorbed by your body.

Researchers at Britain’s Longborough University found that drinking a cup of coffee and immediately lying down for a 15-minute nap kept sleepy volunteers more alert in a car simulator than just coffee or just a nap. We usually stick to a playlist with bumping beats to keep us awake on the road.

Author Jeff Cattel | Special to The Washington Post in 2015 From Greatist.com

Trending Now

Ed Sheeran Brings LOOP Tour to Costa Rica This Saturday

San José is gearing up for one of the biggest concert events the country has seen in years. On Saturday, May 30, 2026, British...

El Salvador Lagoon Turns Turquoise, Drawing Crowds

One of El Salvador's most popular volcanic lakes has taken on a striking new look, and travelers are taking notice. The Laguna de Apastepeque,...

Costa Rica Coffee Culture and the Surprising Numbers Behind It

I just read a statistic that I find difficult to believe. According to worldpopulationreview.com, Hong Kong consumed a heart-racing 43 kilos of coffee per...

Costa Rica Opposition Defends Mining Ban as Crucitas Crisis Deepens

Four opposition factions in Costa Rica's Asamblea Legislativa have closed ranks against the executive branch's bid to reopen metallic open-pit mining in Crucitas, ratifying...

Costa Rican Boxing Star Yokasta Valle Eyes Another World Title

Costa Rican boxing star Yokasta Valle will return to the ring Saturday, May 30, with a chance to add another major belt to one...

Costa Rica Braces for Rain and Thunderstorms as Tropical Wave Moves Through

Costa Rica will see unstable weather from today through June 3, with warm mornings followed by afternoon and early-evening rain across much of pur...

Costa Rica Hosts Expotur 2026 as Tourism Arrivals Continue to Rise

Expotur, Costa Rica’s main tourism business fair, will return to San José from May 27 to 29, bringing international buyers and local tourism companies...

Costa Rica Airport Partners With U.S. Embassy on Travel Safety

Guanacaste Airport in Liberia has become the first airport in Costa Rica to partner with the U.S. Embassy to promote the Smart Traveler Enrollment...

Costa Rica’s La Negrita Basilica Hit by Gunfire as Worshippers Attended Mass

Costa Rica's most important Catholic pilgrimage site was struck by gunfire during Saturday morning Mass, with two bullets shattering windows on the south side...
🌴 The Weekly Pura Vida

Costa Rica, Once a Week

The week's top stories, weather & insider tips — delivered every Sunday. One email, zero clutter.

🔒 Free. No spam. Unsubscribe anytime.

Loading…

Latest News from Costa Rica

Costa Rica Coffee Maker Chorreador

Live prediction market odds via Kalshi. Updates every 60 seconds.
Kalshi is available to US residents 18+. The Tico Times may earn a commission from new signups.

Costa Rica Car Rentals
Costa Rica Travel Insurance
Costa Rica Travel