Our Planet – Page 4 – Nature Observer

The Eruption of Hunga Tonga–Hunga Haʻapai

Hunga Tonga–Hunga Haʻapai is a submarine volcano located in the South Pacific, part of the island nation of Tonga. It lies along the Tonga–Kermadec subduction zone, one of the most…

DeKa September 29, 2025

Climate Environmental Hazards Our Planet

Super Tsunamis: Causes and Consequences

A super tsunami is a rare and catastrophic type of tsunami, much larger and more destructive than typical ones. While ordinary tsunamis are usually caused by underwater earthquakes or landslides,…

DeKa September 28, 2025

Environmental Hazards Our Planet

Why Deep-Focus Earthquakes Occur and Their Connection to Rising Magma

Deep-focus earthquakes are seismic events that occur at depths greater than 300 km below Earth’s surface, sometimes reaching 700 km. Unlike shallow earthquakes, which are linked to surface faults and…

DeKa September 28, 2025

Climate Environmental Hazards Our Planet

What Heats the Earth from Within

The Earth is not only warmed by the Sun but also heated from within. This internal heat is a driving force behind volcanic eruptions, earthquakes, and the movement of tectonic…

DeKa September 28, 2025

Be smart Our Planet

The Earth’s Mantle: Composition and Depth

The mantle is the thick, rocky layer of Earth located between the crust and the core. It makes up about 84% of Earth’s volume and plays a key role in…

DeKa September 27, 2025

Nature Our Planet

Nature: The Foundation of Life on Earth

Nature encompasses all living organisms, landscapes, and physical phenomena that exist independently of human activity. It includes forests, oceans, mountains, rivers, animals, plants, and the atmosphere. Nature is both a…

DeKa September 23, 2025

Ecology Nature Our Planet

Animal Diversity on Earth

Animal diversity refers to the variety of animal species that inhabit Earth, ranging from microscopic organisms to the largest mammals. Scientists estimate that there are more than 8.7 million species…

DeKa September 23, 2025

History Nature Our Planet

Evolution: The Story of Life on Earth

Evolution is the process by which living organisms change and diversify over time. It explains how simple life forms that appeared billions of years ago gradually developed into the complex…

DeKa September 23, 2025

Environmental Hazards Nature Our Planet

Permafrost: The Frozen Ground of the Earth

Permafrost is ground that remains frozen for at least two consecutive years. It is composed of soil, rocks, sand, and organic material bound together by ice. Permafrost is mostly found…

DeKa September 23, 2025

History Nature Our Planet

Pangaea: The Supercontinent of Earth’s Past

Pangaea was a massive supercontinent that existed about 335 to 175 million years ago during the late Paleozoic and early Mesozoic eras. It brought together almost all of Earth’s landmasses…

DeKa September 22, 2025