Magnetic fields by Caroline Jourdain https://padlet.com/jourdain1/magnetic_fields en-us 2017-12-07 09:19:04 UTC 2017-12-08 13:44:10 UTC hello@padlet.com §1 and §2 https://padlet.com/jourdain1/magnetic_fields/wish/214467540 This  newsdaily.com 
article, published in October 2012, explains how studying Mars, the most Earth-like planet in our solar sytem, can help us understand how our magnetic field works.

Our magnetic field shields us from solar radiation and helps migrating animals navigate but might not be as stable as we thought.


]]> 2017-12-08 13:16:22 UTC https://padlet.com/jourdain1/magnetic_fields/wish/214467540 °4 : https://padlet.com/jourdain1/magnetic_fields/wish/214467628 According to scientists, earth's magnetic field is losing strength and may almost disappear before reversing which has happened before.]]> 2017-12-08 13:16:38 UTC https://padlet.com/jourdain1/magnetic_fields/wish/214467628 The end https://padlet.com/jourdain1/magnetic_fields/wish/214467865 The SWARM project will launch 3 satellites next month for changes measurements in the magnetic field and solar studies.
Information about convection currents, ocean currents and magnetic rocks will help improving computer models about magnetic field's weakening.
Lava flows' studies show that previous field's reversals  were chaotic and random, with lots of poles around the planet.
Despite recent advances there are still many gaps in scientific knowledge.]]> 2017-12-08 13:17:24 UTC https://padlet.com/jourdain1/magnetic_fields/wish/214467865 §3 e21500395 https://padlet.com/jourdain1/magnetic_fields/wish/214467875 Evidence of magnetism has been found in Martian rocks only older than 3.5b years old , which proves that Mars once had a magnetic field. Conall Mac Niocaill, earth scientist at Oxford University, said its disappearance allowed solar winds to blow away the atmosphere and cosmic radiation to rise, wiping any life form from the surface.


]]> 2017-12-08 13:17:26 UTC https://padlet.com/jourdain1/magnetic_fields/wish/214467875 $5 : These changes will cause problems with satellites, oil prospection, electricity grids, and means of navigation. https://padlet.com/jourdain1/magnetic_fields/wish/214467963 2017-12-08 13:17:43 UTC https://padlet.com/jourdain1/magnetic_fields/wish/214467963 $6~end https://padlet.com/jourdain1/magnetic_fields/wish/214468556 The European Space Agency will launch 3 satellites in November for project SWARM in order to gather more information on magnetic rocks,convection and ocean currents to improve computer models. 
This will help predict the changes of the magnetic field preceding its revesal which according to previous studies is expected to be chaotic.
Despite recent advances there are still many gaps in scientific knowledge.]]> 2017-12-08 13:19:30 UTC https://padlet.com/jourdain1/magnetic_fields/wish/214468556 https://padlet.com/jourdain1/magnetic_fields/wish/214475806 2017-12-08 13:40:37 UTC https://padlet.com/jourdain1/magnetic_fields/wish/214475806