Apologies in advance to iOS users for pointing to a Flash-only resource, but Cary and Michael Huang’s “The Scale of the Universe” interactive page on NASA’s Astronomy Picture of the Day site is a fascinating update to the classic “Powers of Ten” video created in the 1960s by designers Charles and Ray Eames. We were particularly amused to see Boeing’s Everett, Washington aircraft plant (on the scale of Vatican City) and the virtual Minecraft world (larger than Neptune). follow link
Viewing Wi-Fi Details in Snow Leopard
In Snow Leopard, hold down the Option key before clicking the AirPort menu. Doing so reveals additional technical details including which standards, speeds, and frequencies you're using to connect, as well as what's in use by other networks. With the Option key held down and with a network already joined, the AirPort menu reveals seven pieces of information: the PHY Mode, the MAC (Media Access Control) address, the channel and band in use, the security method that's in use, the RSSI (Received Signal Strength Indication) measurement, the transmit rate, and the MCS Index. In Leopard, some, but not all, of these details are revealed by Option-clicking the AirPort menu.
Interactive Demonstration of the Scale of the Universe