Flares and X-ray jets on the Sun arise in active regions where magnetic flux emerges from the solar interior amd interacts with the ambient magnetic field. The...

Sir The toxic spill by the mining company Boliden into the Guadiamar River and the Doñana Natural Park last April highlighted the lack of co-ordination between...

IN the course of taking submillimetre chromospheric data from Concorde 001 during the eclipse of June 30 (ref. 1), it proved possible to record information on...

It has been suggested that Earth's current supply of water was delivered by asteroids, some time after the collision that produced the Moon (which would have...