can questions

Can that really happen?

Browse direct answers to can questions, from fish drowning to what can actually be seen from space.

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Fish swimming in clear water with visible gill movement

It depends on what you mean by drowning

Can Fish Drown?

Fish can suffocate if the water does not contain enough dissolved oxygen. That is not drowning in the human sense, but the result is the same. Here is how fish breathing actually works.

fishdrowning

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Aerial view of the Great Wall of China winding through mountainous terrain

One of the most repeated myths ever

Can You See the Great Wall of China from Space?

The Great Wall of China is not visible from space with the naked eye. It is too narrow. Multiple astronauts, including Chinese astronauts, have confirmed this directly.

great wall of chinaspace

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Blood typing test showing ABO blood group results

Blood

Can Your Blood Type Change?

Blood type is usually fixed for life, but rare medical events can change what appears on your red blood cells.

blood typeblood

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Ultra realistic educational editorial illustration of a human eye cross-section with the cornea highlighted and glowing, showing the transparent precision of the tissue, clean white background, scientific magazine-quality artwork.

The Daily Wonder

Can an Eye Be Donated?

Eye donation saves and restores sight every day, but not in the way most people imagine. The truth about what gets donated and what gets transplanted is more surprising.

cancan eyes be donated

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Cross-section of bone structure showing mineral composition

Human Body

Can the Human Body Digest Bones?

Your stomach acid is strong enough to dissolve metal. So what actually happens when you swallow a bone? The answer is more nuanced, and more interesting, than you expect.

digestionbones

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Close-up of skin healing at the cellular level

Human Body

Can the Human Body Heal Itself From Anything?

The human body is one of the most sophisticated self-repair systems in nature, but its healing powers have real limits.

human bodyhealing

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A spread of chili peppers of various colours and sizes on a wooden surface

Food Science · Gut Health · Myth Busting

Can Spicy Food Actually Damage Your Gut?

spicy foodcapsaicin

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Abstract visualization of neural and immune networks interweaving

Psychoneuroimmunology

Can Your Mind Heal Your Body?

psychologymedicine

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Abstract brain scan visualization with focal regions of unusual activation

Psychology & Neuroscience

Can You Really Be Hypnotized?

hypnosispsychology

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Close-up of the edge of a palm showing fine vertical lines near the pinky finger

Palmistry vs. Biology

Can Palm Reading Predict How Many Children You'll Have?

palmistryfertility

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An open palm with dramatic light tracing the major creases

Palmistry vs. Science

Can Palm Reading Predict Death? What Science Says About the Life Line

palmistrypseudoscience

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Close-up of eyes in a half-open state with a blurred, dim sleeping environment behind

Sleep Science

Can You Train Yourself to Sleep With Your Eyes Open?

sleepbiology

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Side-by-side image of a liger and a hybrid bear illustrating cross-species offspring

Evolutionary Biology

Can two different species mate?

biologyevolution

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Shattered glass with fragments suspended mid-fall, played backward time reversal visualization

Physics of Time

Can Time Move Backward? What Physics Says About the Arrow of Time

physicstime

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