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Why can cold water make you gasp?

A sudden gasp in cold water can begin before the body’s core has had time to cool substantially. Rapid cooling of the skin triggers an acute response, which makes cold shock a different part of the story from later hypothermia.

3–5 min

Questions you could explore

  • Why does the location and speed of cooling matter?
  • How does the initial cold-shock response differ from the effects of a falling core body temperature?

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Health and the body

Daylight and the body's clock

Even in a room with no clocks, your body follows an internal roughly 24-hour schedule of sleepiness, hunger, and alertness. Those internal daily rhythms respond to outside cues, with morning and evening light helping reset and coordinate the body's master clock.

3–5 min

Daylight and the body's clock

Health and the body3–5 minEven in a room with no clocks, your body follows an internal roughly 24-hour schedule of sleepiness, hunger, and alertness. Those internal daily rhythms respond to outside cues, with morning and evening light helping reset and coordinate the body's master clock.

Health and the body

How vaccines build immune memory

The first time the immune system encounters an unfamiliar antigen, building a response takes time. Vaccines help develop recognition and memory before a later encounter with a pathogen. Different types introduce antigens or instructions for making them in different ways, offering a starting point for exploring how immune memory works.

4–5 min

How vaccines build immune memory

Health and the body4–5 minThe first time the immune system encounters an unfamiliar antigen, building a response takes time. Vaccines help develop recognition and memory before a later encounter with a pathogen. Different types introduce antigens or instructions for making them in different ways, offering a starting point for exploring how immune memory works.

Health and the body

Antibiotics and the viruses they cannot treat

Antibiotics can treat certain bacterial infections, but they do not treat the viruses that cause a common cold. Because bacteria are living cells with their own metabolic machinery and viruses are tiny genetic packages that hijack your cells, an antibiotic that disables bacteria has no matching target in the viruses that cause a cold.

2–3 min

Antibiotics and the viruses they cannot treat

Health and the body2–3 minAntibiotics can treat certain bacterial infections, but they do not treat the viruses that cause a common cold. Because bacteria are living cells with their own metabolic machinery and viruses are tiny genetic packages that hijack your cells, an antibiotic that disables bacteria has no matching target in the viruses that cause a cold.

Why can cold water make you gasp? | Speech Topic | speaking.app