IZZYbike has no chain + 2 wheel drive option

Bicycle chains are oily. Oil holds dirt. Chains are a highly efficient method of transferring power, but they still cause losses. By moving the pedals from between the wheels to directly connected to the front wheel, the chain is eliminated, & with it, all of its disadvantages. At the same time, the bicycle becomes shorter, making it easier to maneuver & store. With the front & back wheels much closer together, it is easy to insert an idler wheel between them, providing 2 wheel drive. / bike chain dirty and noisy manufacturer replace belt drive Polish inventor Marek Jurek IzzyBike prototype drivetrain built in front wheel hub less mess fold bike extra hinges built into the frame very short wheelbase maneuverable 29 inch wheels jockey front and back wheels 2-wheel-drive increased traction more comfortable ride increased stability better visibility industrial partners potential customers price materials accessories /

Carry-on shame

"As we board, we notice  them. The baggage hogs. Those uncaring, rule breaking, inconsiderate passengers who knowingly take too much on board:

http://1bag1world.com/2014/06/carry-shame/ / toting sizer fitting weight reduced carry on carry-on bag fit overhead bin personal item small enough fit under the seat in front enough room extend our legs board boarding baggage hog uncaring rule breaking inconsiderate passengers on board pay for checked bags don’t know how to pack waved past passed gate agent the whole world revolves around me take up entire overhead bin over-sized carry-on bag over sized carry on personal item large dimensions allowed carry-on bag fit under the seat travel writer Spud Hilton travel editor San Francisco Chronicle name shame shaming take advantage of the system passenger pass security take a photo or video culprit post it on Twitter Instagram Vine hashtag  #carryonshame post the best Bad Lattitude blog SFGate post Twitter Instagram @CarryOnShame carryonshame airlines listen start cracking down United enforce enforcing enforcement shame few people /

Humans are brainy weaklings

The heading is obvious to most of us: the achievements of the human mind eclipse anything achieved by other animals. By contrast, in the physical sphere, there are animals that can run or swim faster & lift greater weights.

Some of the difference in physical capability are due to reasons other than strength: e.g. swimming speed of some fish is substantially due to their torpedo shape. Four legs & a flexible spine give the big cats a longer stride which partly explains their great speed.

While there is an obvious relationship between size & strength, gram-for-gram, chimpanzee muscle is twice as strong as human muscle.

Recent research, described in the linked article, indicates that the parts of the human brain associated with intellect has been the site of accelerated evolution. No surprises there. Puzzlingly, in parallel, human muscle has evolve to be less strong, gram-for-gram. Result is the greater intelligence & lesser strength of humans, compared with our closest living relative, the chimpanzee.

http://www.economist.com/news/science-and-technology/21602988-human-beings-are-brainy-weaklings-muscled-out / geek nerd swots weedy jocks stupid cliche cliché paper just published PLOS Biology research researchers Chinese Academy of Sciences Max Planck Institute Germany evolutionary evolution truth Katarzyna Bozek colleagues how quickly human tissues have evolved compared other mammals human brain stronger species muscles weaker demonstration science hypothesis human brains 2% adult body weight fifth metabolic energy Richard Wrangham Harvard University cooking makes more nutrients available food raw state neurological expansion Homo sapiens supply brain energy other human organs under pressure economise muscle economised a lot Dr Bozek colleagues study metabolome water-soluble chemicals small molecules sugars amino acids vitamins biochemistry research researchers five types of tissue individuals four species mammal humans chimpanzees rhesus monkeys mice previously healthy dead individuals humans died mainly in accidents tissue types brain prefrontal cortex visual cortex cerebellum thigh muscle kidney metabolic enhancement metabolomes two species proportional time evolving separately larger differences particular type of tissue suggest strong specific evolutionary pressures on that tissue human prefrontal cortex complex cognitive behaviours abstract thought show markedly greater differences metabolome equivalent other species tissues thigh-muscle metabolism Homo sapiens sacrificed brawn for brains /