There are those who physically circle the globe, as for example, from the  New York Times  this morning: For more than 20 years, the British adventurer Alastair Humphreys roamed the planet. He rowed across the Atlantic, traversed India on foot,  cycled around the world . In his lovely essay “ A Single Small Map Is Enough for a Lifetime ,” published last month, he writes that climate change and familial commitments have caused him to narrow his horizons of late, to seek diversion in his own backyard, “on the fringes of a city in an unassuming landscape, pocked by a glow of sodium lights and the rush of busy roads. ” Particularly note his  global bicycle adventure : 60 countries. 5 continents. Up to an altitude of 16,000 feet between Peru and Argentina. Biked through temperatures as low as  -40 F, which amazingly enough is also -40C . 46,000 miles. On the way, Mr Humphreys has raised more than £13,000 for British-based charity Hope and Homes for Children, which supports those orphaned or