"There's no machine known that is more efficient than a human on a bicycle. Bowl of oatmeal, thirty miles. You can't come close to that." —Not surprising that Bill Nye, the Science Guy, has known about the efficiency of the bicycle for a long time.

"Cities are meant to stop traffic. That is their point. That is why they are there. That is why traders put outposts there, merchants put shops there, hoteliers erect inns there. Rationally one wants to have traffic *stop* there, not go *through*."

UK STUDY: Fit amateur bicycle-riders aged 55-79 have immune systems comparable to those of 20 year olds.

How exercise in old age prevents the immune system from declining

Highly active elderly people can boost their immune systems to protect against infection, according to research.

Kamala Harris's new VP pick, Minnesota governor Tim Walz, has a strong record on sustainable transport, including new bus rapid transit funding, e-bike credits, and the hugely popular Twin Cities - Chicago Borealis Amtrak route.

Great-grandfather: allowed to walk 6 miles on his own. Grandfather: could walk 1 mile. Mother: could walk a half mile. Son: could walk 300 yards (to end of street). What happened? *Cars* happened. A flood of traffic shrunk the geography of play and free-roaming. 🧵