Scientists have discovered that the Earth's magnetic field 3.5 billion years ago was only half as strong as it is today, sciencedaily.com writes.
When Earth was young, it exhaled the atmosphere. However, some light elements got trapped inside the planet. What caused Earth to hold its last breath? sciencedaily.com asks.
Vårt bilde av Jordas indre struktur og bevegelser har blitt mer detaljert i det første tiåret i det nye millenniet, skriver geolog Reidar Trønnes i denne kronikken som oppsummerer forskningsåret 2009 - og siste tiår. Les den på forskning.no.
Volcanoes are pressure valves that release energy from deep within the Earth. Beautiful and powerful, awe-inspiring and deadly, they are spectacular reminders of the dynamic forces that continually shape our planet. Try the VolcanoExplorer at discovery.com.
Hawaii has long been a puzzle for geologists. Plate tectonic theory readily explains the existence of volcanoes at boundaries where plates split apart or collide, but mid-plate volcanoes such as those that built the Hawaiian island chain have been harder to fit into the theory, ciw.edu says.
