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d3437a0c0f2c41f2203d8505edb49b5a
2005-06-02 07:15:29

In their explorations of Mars, both the Spirit and Opportunity rovers found evidence that liquid water was once on the planet's surface. Joy Crisp, project scientist for NASA's Mars Exploration Rovers, discussed the rovers' long journey and their surprising discoveries at a public lecture on May 19, 2005. In this contribution, Crisp explores why the Spirit rover might be called a problem child. This edited transcript of the lecture is Part 2 of a 4-part series. Astrobiology Magazine --...


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2005-05-26 10:06:59

There are a number of iron oxides: Iron oxides Iron(II) oxide or ferrous oxide (FeO) The black-coloured powder in particular can cause explosions as it readily ignites. Iron(III) oxide or ferric oxide (Fe2O3) known in its natural state as hematite or haematite, but also purified for use as a coating in magnetic audio and computer media, where it is known as ferric oxide. Also known as rouge. Iron(II,III) oxide or ferrous ferric oxide (Fe3O4), better known as the black-coloured...

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Word of the Day
ambsace
  • Bad luck; misfortune.
  • The smallest amount possible or the most worthless thing.
The word 'ambsace' comes from a Latin word meaning 'both'.