Bat squeaks louder than a rock concert I used to live next door to a colony of bats that occupied a giant Moreton Bay Fig tree on an adjoining property, and yes, they were LOUD. Bat calls, it turns out, can reach up to a deafening 140 decibels (dB) - that's 20 dB louder than a rock concert and 15 dB above the human pain threshold. Bats use high-pitched ... Read full entry

...somewhere anyway. Apparently there are now only 60 stars visible in the night sky from central Sydney because of growing light pollution caused by the haphazard and rampant increase of outdoor and street lighting.The Southern Cross constellation, whose status is central to the Australian flag, is in danger of being referred to as the Southern Triangle, as the mounting glare from the city's various light sources makes it ever harder ... Read full entry