But he said "there may be other instruments that can do that".
Unlike Mariner 10, the Messenger spacecraft has instruments that can measure ions.
Curiosity, however, does not have instruments that can directly search for life, past or present.
Unlike Curiosity, Opportunity is not carrying instruments that can detect those kinds of molecules.
Options, futures and forward contracts are aggressive, speculative instruments that can earn large profits — or suddenly become worthless.
It examines the properties of chemical surfaces, relying heavily on instruments that can provide a chemical profile of such surfaces.
Qatar Holding had acquired the warrants, which are financial instruments that can be exchanged for stock, during the financial crisis.
"Why on earth would you gift that to anybody let alone those who make instruments that can be used to kill?" she asked.
The department has many tools in its arsenal, from bomb-disposal devices to speedboats to instruments that can detect biological or chemical attacks.
Its founders, OpenUp Music in Bristol, have developed a range of digital instruments that can be played with any part of the body, including the eyes.
The researchers aren't sure if that's the case on Mars, because the Spirit rover doesn't carry instruments that can detect microscopic life.
