Measurements from orbit suggest that the martian permafrost is within half a metre of the surface.
"Every half-metre, it takes a measurement of the temperature and the salinity, " said Mr Hadow.
That is - details on the ground as small as half a metre are discernable.
Jorge walks past a rusty steel pipe, about half a metre high.
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And with sea levels due to rise in the next century by half a metre in some places, maintenance can only get costlier.
But while everyone was focusing on Jonathan and the Brit Martyn Rooney, Kevin came out of nowhere to finish half a metre ahead of the competition.
There might be even more: the measurements probe only the top half-metre of regolith, but it is thought that cometary bombardment could have left ice in the top two metres.
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The Wales fly-half followed that up with a superb penalty from a metre inside his own half, which soared straight and true to bisect the Munster posts.
The animal, which may have grown from half-a-metre long to more than three feet, was described as "quite shy".
The lead lasted just three minutes into the second half as Ross booted Saracens back in front with a penalty from a metre inside his own half.
Some stand a metre and a half from base to wick, their white paraffin wax decorated with religious symbols.
Viewers are confronted by half a dozen two-metre (six-foot) foam panels, each of which is blank except for pre-cut holes.
This entailed a complete lap of the 400 metre track and half of the tarmac perimeter before venturing into Castletown Road to Braddan.
Then, about 200 men walk the route wearing half- to full-metre-tall paper bishop hats, lit from within by candles and cut with intricate, stained glass window-like designs featuring Saint Nicholas.
Yannick Jauzion's forward pass denied full-back Maxime Medard a clear run and a Blues chance was blown when Jamie Roberts could not hold Nicky Robinson's pass after the fly-half's 45-metre run.
But just as striking for me has been the experience of sitting no more than a metre and a half away from Oscar Pistorius - able to hear his breathing patterns, his sobs, muttered prayers, and to see the muscles strain on his neck as he stares forward, with the concentration you would expect from someone braced for the start of an Olympic final.
O'Sullivan picked up from the five metre scrum and substitute outside half Jeremy Manning converted his score.
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But, when Michael Stephenson was penalised for crossing by referee Dean Richards shortly before half-time, Newcastle's fly-half was on song with a 37-metre strike to make it 11-0 at the break.
The scrum-half then sniped over from a five-metre scrum to score the first try of the match and although he missed the conversion a second penalty gave the fired-up visitors an 11-3 lead after 11 minutes.
Bath laid siege to the Blues line as the half ran out, even opting for a five-metre scrum instead of taking a penalty kick, but the Welsh defence held firm.
The outside-half added the conversion and, minutes later, a 30-metre penalty to compound the visitors' nightmare start.
The Sharks took the lead when Sililo Martens fed a quick ball from a ruck to his half-back partner Daniel Larrechea who slotted home a 22-metre drop goal.
Worcester resisted the temptation to follow their hosts' example, a ploy which was rewarded on the half-hour mark when, after a series of five-metre scrums, Goode pierced a gap in the Pirates' defence to cross for the Warriors' second try.
Home fly-half Isa Nacewa missed a penalty from close to the 10-metre line and, from the restart, lovely hands from Nathan Hines, Shaun Berne and McFadden created an opening on the left for Kearney to get over in the corner.
The England centre's 35-metre penalty fell short near the end but a 30-metre drop goal from Lamb, Spencer's replacement at fly-half, finished Sale off.
In an action-packed first half Ponty began superbly - going into the lead after four minutes with a 22-metre penalty goal from full-back Brett Davey.
Halfpenny had a chance just before half-time to narrow the gap but the penalty chance from his own 10-metre line asked too much from even the wing's powerful boot.
Stephen Jones put in a try-saving tackle on his rival fly-half but the ball rebounded off the Scarlets man into touch and the Ospreys had a five-metre attacking line-out.
In 1960 Don Walsh, along with Jacques Piccard, undertook an eight-and-a-half hour decent in the bathyscaphe Trieste to the deepest part of the ocean, the 10, 911 metre (36, 000ft) Challenger's Deep in the Mariana Trench off the coast of the Phillipines.
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