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9 results for “sun”.

• Life in the Deep Sea: What Survives Under Crushing Pressure
  Below the last glimmer of sunlight lies the largest habitat on Earth — dark, near-freezing, and at pressures that would flatten a submarine. Life did not merely endure the descent; it rewrote its biochemistry to thrive there.
• How Lightning Forms, and Why It Strikes Where It Does
  A single flash carries more current than a power station, heats the air hotter than the sun's surface, and creates the thunder you hear seconds later. Here is the honest physics of how a cloud decides where to discharge — and how to stay safe under one.
• Comets: How Icy Visitors Build Their Tails, and When You Can See One
  A comet is a snowball the size of a town that grows a tail longer than Earth's orbit on the way to meet the sun. Here is the physics of the two-tailed transformation, where these visitors come from, and how to plan a night around one.
• Why the Sea Rises and Falls: How Tides Work
  Twice a day, the ocean breathes in and out. Tides are not weather — they are the gravitational handshake between the Earth, the Moon and the Sun, and they happen with clockwork precision you can predict years in advance.
• What Causes a Tsunami, and How Warnings Work
  A tsunami is not a wave in the ordinary sense — it is the whole ocean being displaced at once. Understanding what sets one off, why it looks harmless in deep water, and how minutes of warning can save lives, is the difference between curiosity and survival.
• Why the Sky Is Blue and Sunsets Are Red: One Effect Explains Both
  Sunlight looks white but is every colour at once. The reason the daytime sky is blue and the evening one is orange is the same scattering trick — and it also explains why space is black and clouds are white.
• BMI Explained: What the Number Really Measures — and Where It Fails
  Body Mass Index is the most-used and most-misunderstood health number there is. Here is the arithmetic behind it, why the standard cut-offs exist, and the four situations where BMI flat-out misleads.
• Why We Have Seasons — It Is Not Because Earth Gets Closer to the Sun
  The most common astronomy misconception on Earth: seasons are caused by the 23.4-degree tilt of our axis, not distance. The proof is that January, Earth's closest approach, is winter in the north.
• What Causes Auroras — and How to Predict the Next One
  Solar wind funnels down Earth's magnetic field and paints the sky at 100 km altitude. A guide to the colours, the Kp scale, and how ordinary travellers can plan to see one.