To top it all off, the lithium-air batteries with graphene bubbles are lighter in weight than current batteries. Less weight, less cost and more energy sounds like the future to us. Via PhysOrg ...

Proceedings of the Royal Society of London. Series A, Mathematical and Physical Sciences, Vol. 263, No. 1313 (Sep. 5, 1961), pp. 212-216 (5 pages) Variations in air density between day and night in ...

Experiments dropping raindrops onto ash combined with raindrop fossil imprints yield an upper limit for air density in the Archaean. About 2.7 billion years ago, towards the end of the Archaean ...