Polonium Halos cannot survive in rock unless it is cold. A plastic or liquid state will destroy any halo that may be formed..  The Polonium Halos found in the Granites of the Lithosphere indicate it was formed within the longest  lifespan of the isotopes emissions, that is in the case of Polonium, a few minutes.  

Red Shifted Starlight / Center of the Universe

The preponderance of Red Shifted Starlight and radial symmetry of the visible Universe, says Hubble indicates that our solar system is near the center of the visible Universe, and that Universe is expanding radially more or less uniformly in all directions and at a rate which increases linearly with distance from our solar system.

Being at the center of the expanding Universe and therefore at it's Gravitational Center indicates that our Solar System has always experienced Time from the perspective of a Gravitational Well. 

Our Solar System, then is able to have a relatively short history, while observing distant astronomic events which are relatively ancient..

Polonium Halos: Unrefuted Evidence for Earth's Instant Creation!

This writer's Hypothesis is that the depth of the atmosphere was much greater in the past, that the loss of say half of the atmosphere's mass resulted in the dinosaurs extinction by asphyxiation.  Creatures which could adapt to the now rarified atmosphere by resetting their gene for maximum size like the Mammals made this transition most easily.

Atmospheric pressure varies:

Gas transfer across a membrane during respiration varies with pressure as:

We say also that the atmosphere is being constantly eroded into space as a result of global temperature changes and the volumetric displacement that goes along with that.  Fortunately there remains a supply of fresh atmospheric gasses beneath the crust of the earth which is most noticeable at it's release from  Hydrothermal Vents. 

You might say the earth is functioning like a fluid filled tire which is gradually going flat.  The fluid wets its surface, for a while, but eventually vaporizes into Space.

More:  Funstuff:  Gigantism, Fossil