Can Wild Animals Really 'Sense' Fear in Other Animals?

iStock
iStock

Stefan Pociask:

All too often, some interpret the phrase “They can sense your fear” as something telepathic, some additional non-human sense, or something that is not understood. That, of course, is not it at all. Animals sense fear in others by just using various combinations of the five senses that we are all already familiar with.

Most everyone knows that the majority of vertebrates have at least one sense, if not more, that is more developed and stronger than what humans possess. The nose of a bloodhound, the eyes of an eagle, the ears of an owl, etc. (our sense of taste ranks about average, and our sense of touch is better than most).

In any case, it shouldn’t be surprising that animals can use those heightened senses to sense fear in other animals. No “sixth sense” is required. Actually, only various combinations of three are required: smell, sight, and hearing. I think we can all agree that, if it gets down to an animal tasting your fear or touching your fear, it’s already too late for you, or the prey in question, in any case.

That’s not to say that there are not more than our five senses. Take the sense of navigation in animals like pigeons and other birds; we don’t have that. There’s the sense of echolocation, found in certain bats and whales; we don’t have that, either. Nor the sense related to electroreception, in sharks and other fish. There are several others, scattered about the animal kingdom.

Having said all that … the most brave, fearless, aggressive bunny in the world is still going to feel the jaws of that fox or coyote crush his body, if the predator gets close enough. The fearless dodo bird was still regularly scooped up by sailors and other predators (that being one of the few higher animals who never developed the “fight or flight” response).

The ability to either sense fear or project fear plays a large part in the predator/prey relationship. For a human, not projecting fear won’t necessarily save you from being jumped by that cougar, nor being trampled by that bull elephant, but it might increase your chances of surviving. On the other hand, projecting fear in those situations will almost certainly decrease your chances of surviving. Your adversary in situations like that will surely be using its basic senses (sight, smell, and hearing) to determine its next course of action, in regards to you.

The “other animals” are not the only ones who can and do sense fear. Humans do it, as well. Granted, our level of fear-sensing is not as acute as most other vertebrates. But we still have the ability. Bullies use it. Car salesmen use it. Debt collectors use it. Con men and scam artists use it. Athletes use it. Diplomats use it. And of course, various types of warriors use it.

There’s a related term here: "Never let them see you sweat." That, if applied both figuratively and literally, is what it’s all about. Yet, it’s more than just about sweating.

In the end, it’s not particularly difficult to understand how animals, including us, can sense fear. Actually, it is beneficial that you understand it; that you understand how fear is both projected, and how it is sensed. It can help you to keep from getting bullied, from getting taken advantage of, and indeed, there are times when it can help you to survive. Part of it is instinctual, and part of it is learned. A good part of it is skill. You’d be well served to learn this skill well, both sensing it and controlling the projecting of it. Yet, to learn it best, you must understand it.

To understand it best, I would suggest that you change the phrase from "sensing fear" to "reading fear." It’s not only the wild animals. Most all animals are capable of it ... including you.

This post originally appeared on Quora. Click here to view.

Take Advantage of Amazon's Early Black Friday Deals on Tech, Kitchen Appliances, and More

Amazon
Amazon

This article contains affiliate links to products selected by our editors. Mental Floss may receive a commission for purchases made through these links.

Even though Black Friday is still a few days away, Amazon is offering early deals on kitchen appliances, tech, video games, and plenty more. We will keep updating this page as sales come in, but for now, here are the best Amazon Black Friday sales to check out.

Kitchen

Instant Pot/Amazon

- Instant Pot Duo Plus 9-in-115 Quart Electric Pressure Cooker; $90 (save $40) 

- Le Creuset Enameled Cast Iron Signature Sauteuse 3.5 Quarts; $180 (save $120)

- KitchenAid KSMSFTA Sifter with Scale Attachment; $95 (save $75) 

- Keurig K-Mini Coffee Maker; $60 (save $20)

- Cuisinart Bread Maker; $88 (save $97)

- Anova Culinary Sous Vide Precision Cooker; $139 (save $60)

- Aicook Juicer Machine; $35 (save $15)

- JoyJolt Double Wall Insulated Espresso Mugs - Set of Two; $14 (save $10) 

- Longzon Silicone Stretch Lids - Set of 14; $13 (save $14)

HadinEEon Milk Frother; $37 (save $33)

Home Appliances

Roomba/Amazon

- iRobot Roomba 675 Robot Vacuum with Wi-Fi Connectivity; $179 (save $101)

- Fairywill Electric Toothbrush with Four Brush Heads; $19 (save $9)

- ASAKUKI 500ml Premium Essential Oil Diffuser; $22 (save $4)

- Facebook Portal Smart Video Calling 10 inch Touch Screen Display with Alexa; $129 (save $50)

- Bissell air320 Smart Air Purifier with HEPA and Carbon Filters; $280 (save $50)

Oscillating Quiet Cooling Fan Tower; $59 (save $31) 

TaoTronics PTC 1500W Fast Quiet Heating Ceramic Tower; $55 (save $10)

Vitamix 068051 FoodCycler 2 Liter Capacity; $300 (save $100)

AmazonBasics 8-Sheet Home Office Shredder; $33 (save $7)

Ring Video Doorbell; $70 (save $30) 

Video games

Sony

- Marvel's Spider-Man: Game of The Year Edition for PlayStation 4; $20 (save $20)

- Marvel's Avengers; $27 (save $33)

- Minecraft Dungeons Hero Edition for Nintendo Switch; $20 (save $10)

- The Last of Us Part II for PlayStation 4; $30 (save $30)

- LEGO Harry Potter: Collection; $15 (save $15)

- Ghost of Tsushima; $40 (save $20)

BioShock: The Collection; $20 (save $30)

The Sims 4; $20 (save $20)

God of War for PlayStation 4; $10 (save $10)

Days Gone for PlayStation 4; $20 (save $6)

Luigi's Mansion 3 for Nintendo Switch; $40 (save $20)

Computers and tablets

Microsoft/Amazon

- Apple MacBook Air 13 inches with 256 GB; $899 (save $100)

- New Apple MacBook Pro 16 inches with 512 GB; $2149 (save $250) 

- Samsung Chromebook 4 Chrome OS 11.6 inches with 32 GB; $210 (save $20) 

- Microsoft Surface Laptop 3 with 13.5 inch Touch-Screen; $1200 (save $400)

- Lenovo ThinkPad T490 Laptop; $889 (save $111)

- Amazon Fire HD 10 Tablet (64GB); $120 (save $70)

- Amazon Fire HD 10 Kids Edition Tablet (32 GB); $130 (save $70)

- Samsung Galaxy Tab A 8 inches with 32 GB; $100 (save $50)

Apple iPad Mini (64 GB); $379 (save $20)

- Apple iMac 27 inches with 256 GB; $1649 (save $150)

- Vankyo MatrixPad S2 Tablet; $120 (save $10)

Tech, gadgets, and TVs

Apple/Amazon

- Apple Watch Series 3 with GPS; $179 (save $20) 

- SAMSUNG 75-inch Class Crystal 4K Smart TV; $998 (save $200)

- Apple AirPods Pro; $169 (save $50)

- Nixplay 2K Smart Digital Picture Frame 9.7 Inch Silver; $238 (save $92)

- All-New Amazon Echo Dot with Clock and Alexa (4th Gen); $39 (save $21)

- MACTREM LED Ring Light 6" with Tripod Stand; $16 (save $3)

- Anker Soundcore Upgraded Bluetooth Speaker; $22 (save $8)

- Amazon Fire TV Stick with Alexa Voice Remote; $28 (save $12)

Canon EOS M50 Mirrorless Camera with EF-M 15-45mm Lens; $549 (save $100)

DR. J Professional HI-04 Mini Projector; $93 (save $37)

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How Much Is the Earth Worth?

The New York Public Library, Unsplash
The New York Public Library, Unsplash

Our home planet may be the most precious place we know, but it isn't priceless. The Earth's resources and the value it offers to humans add up to some unknown, tangible cost. The species may never have to worry about buying or selling the world, but thinking of it in terms of concrete numbers can help us better understand its value. Now, as Treehugger reports, one scientist has developed a special formula that allows us to do just that.

According to the calculations of Greg Laughlin, an assistant astronomy and astrophysics professor from the University of California, Santa Cruz, the Earth is worth roughly $5 quadrillion (or $5,000,000,000,000,000). He came up with that price after gauging the planet's mass, temperature, age, and other factors that directly correlate to its ability to sustain life.

To emphasize just how valuable the Earth is, Laughlin also estimated the worth of other planets in our solar system. Our nearest neighbor Mars costs about the same as a used car at $16,000. That's a fortune compared to Venus, which he appraised at the meager value of one cent.

Laughlin doesn't expect these numbers to have applications in the real world. Rather, he hopes they will inspire people to better appreciate the only home they know. He's not the first person to put a massive, hypothetical price tag on something just for fun. The cost of the Death Star from Star Wars has been calculated at $852 quadrillion—many times Laughlin's estimate for Earth.

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