منابع مشابه
Why the bigger live longer and travel farther: animals, vehicles, rivers and the winds
Here we show that constructal-law physics unifies the design of animate and inanimate movement by requiring that larger bodies move farther, and their movement on the landscape last longer. The life span of mammals must scale as the body mass (M) raised to the power 1/4, and the distance traveled during the lifetime must increase with body size. The same size effect on life span and distance tr...
متن کاملRolling stones and turbulent eddies: why the bigger live longer and travel farther
Here we report the discovery that even the simplest, oldest and most prevalent forms of evolutionary movement--rolling bodies and whirls of turbulence--exhibit the same body-size effect on life time and life travel as the evolutionary movement united by the body-size effect so far: animals, rivers, vehicles, jets and plumes. In short, the bigger should last longer and travel farther. For rollin...
متن کاملRoving Faster Farther Cheaper
Current Mars rovers travel a few kilometers per year. Future rovers will need to travel a couple orders of magnitude faster than that in order to move from safe landing zones to areas of scientific interest – which may be many 10s of kilometers away from a suitable landing location. This paper describes a recent field test of the SR-II rover. SR-II is a 22kg solar powered autonomous rover, whic...
متن کاملDo avian cooperative breeders live longer?
Cooperative breeding is not common in birds but intriguingly over-represented in several families, suggesting that predisposing factors, similar ecological constraints or a combination of the two facilitate the evolution of this breeding strategy. The life-history hypothesis proposes that cooperative breeding is facilitated by high annual survival, which increases the local population and leads...
متن کاملWhy do boomers plan to work longer?
OBJECTIVE . Recent changes in retirement trends and patterns have raised questions about the likely retirement behavior of baby boomers, the large cohort born between 1946 and 1964. This study examined recent changes in retirement expectations and the factors that drove them. METHODS Using data from the Health and Retirement Study, the analysis compared self-reported probabilities of working ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Molecular Cell
سال: 2002
ISSN: 1097-2765
DOI: 10.1016/s1097-2765(02)00748-7