4.5x10^18 worth of 70 kilo gram life forms; If it was just human beings that would be enough to populate 4.5 MILLION worlds with 1x TRILLION people EACH! An earth sized planet CAN NOT support a population that massive on just the surface (1 trillion people) 1 million american black ants DONT even weigh 40 kilos; A blue hump back whale weighs 200 tons and there are LESS THAN 2000 on earth right now; The 1000x extra 70 kilo human mass weight MORE than compensates for ALL other species. The other bit is only 1/3-2/3 of the GALAXY is even habitable (too much cosmic radiation within the unstable galactic core) Yea there are TRILLIONS of stars in the milky way; by our estimate 1 in 100-1500 contains an M class planet in the goldilocks zone. Only 1/3-2/3 are habitable due to the location in the galaxy. That brings the number of stars that have habitable M class planets down from a few trillion possibilities to only 5-20 million Even at 5-20 million THERE IS STILL ENOUGH EXTRA WEIGHT/mass accounted for in my equations to represent ALL biomass in the galaxy. Yea thing is about calc for extra targets hit to absorb all energy from halo network; There is only soo much population in the halo universe; i cant just artificially overpopulate it; thats called unrealistically fudging the numbers. The halo builders designed a weapon for total life obliteration via omnidirectional energy bursts; THEY WOULD HAVE KNOWN mathematically 99.9999% of the energy would just fly out into empty space and dissipate.