Navigation Links
Bigger creatures live longer, travel farther for a reason
Date:8/24/2012

DURHAM, N.C. -- A long-standing mystery in biology about the longer lifespans of bigger creatures may be explained by the application of a physical law called the Constructal Law (www.constructal.org).

What this law proposes is that anything that flows -- a river, bloodstream or highway network -- will evolve toward the same basic configuration out of a need to be more efficient. And, as it turns out, that same basic law applies to all bodies in motion, be they animals or tanker trucks, says Adrian Bejan, the J.A. Jones Professor of mechanical engineering at Duke and father of the Constructal Law.

In his latest theory paper, appearing Aug. 24 in the journal Nature Scientific Reports, Bejan argues that there is a universal tendency for larger things, animate and inanimate, to live longer and to travel further.

He starts his argument with an examination of the well-known observation in biology that larger animals tend to live longer. Bejan wanted to see if this general rule might apply to inanimate systems as well and proceeded to mathematically analyze the relationship in rivers, jets of air and vehicles.

He found, as a general rule, that bigger rivers are older and that larger jets of air, such as atmospheric jet streams, last longer. By his calculations, larger vehicles should also last longer, but hard evidence of that is lacking, he says, and there are outliers of course, like Subaru Justys with 300,000 miles.

By being larger and lasting longer, all of these systems also travel farther, he says.

If you look at a moving vehicle or animal simply as a mass in motion, that is, something flowing, "the spreading of the mass of vehicles and animals is completely analogous to the flow of water in river channels," Bejan says. "It is the same design."

Interestingly, if the body size and lifespan of known species of animals are plotted on a curve, it falls on a slope of about . And then, following
'/>"/>

Contact: Karl Leif Bates
karl.bates@duke.edu
919-681-8054
Duke University
Source:Eurekalert

Page: 1 2

Related biology news :

1. Bigger gorillas better at attracting mates and raising young
2. Bigger refuges needed to delay pest resistance to biotech corn
3. Want bigger plants? Get to the root of the matter
4. For mitochondria, bigger may not be better
5. Acoustic tweezers capture tiny creatures with ultrasound
6. MARC travel awards announced for EB 2012
7. MARC travel award announced for the 2012 ASCI/AAP Joint Meeting
8. 2012 ACMG Foundation/Signature Genomic Laboratories Travel Award winner announced
9. Copy of the genetic makeup travels in a protein suitcase
10. Chemical fingerprinting tracks the travels of little brown bats
11. The Genetics Society of America announces DeLill Nasser Travel Award recipients
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/13/2015)... , Jul. 13, 2015 NXT-ID, Inc. (NASDAQ: ... biometric authentication company focused on the growing mobile ... provisional patent 62/188684 for BEHAVIORAL-DIRECTED AUTHENTIATION ... new convenient and secure method to make payments.  ... payment methods, introduced with its groundbreaking voice-direct payment ...
(Date:7/9/2015)... , July 9, 2015  Synaptics ... developer of human interface solutions, today announced ... industry,s first fully hardware encapsulated fingerprint sensor ... authentication technology is literally off the grid, ... biometric matching within the fingerprint sensor to ...
(Date:7/8/2015)... -- The consumer products industry for innovative tech ... such as wearables, smart wallets & other smart technology are ... continues to rapidly grow.  Biometrics & Wearable Device Companies in ... Inc. (NASDAQ: GOOG ), Apple Inc. (NASDAQ: AAPL ... GPRO ) and Baidu Inc. (NASDAQ: BIDU ) ...
Breaking Biology News(10 mins):NXT-ID Patents Behavior-Directed Payments 2NXT-ID Patents Behavior-Directed Payments 3NXT-ID Patents Behavior-Directed Payments 4Synaptics Announces World's First Match-in-Sensor Fingerprint Authentication Technology 2Synaptics Announces World's First Match-in-Sensor Fingerprint Authentication Technology 3Consumers Flock to This Summer's Must Have Tech Gadgets as Latest Digital Wallets, Smart Technology & Wearable Products Continue to Grow in Popularity & Functionality 2Consumers Flock to This Summer's Must Have Tech Gadgets as Latest Digital Wallets, Smart Technology & Wearable Products Continue to Grow in Popularity & Functionality 3Consumers Flock to This Summer's Must Have Tech Gadgets as Latest Digital Wallets, Smart Technology & Wearable Products Continue to Grow in Popularity & Functionality 4Consumers Flock to This Summer's Must Have Tech Gadgets as Latest Digital Wallets, Smart Technology & Wearable Products Continue to Grow in Popularity & Functionality 5Consumers Flock to This Summer's Must Have Tech Gadgets as Latest Digital Wallets, Smart Technology & Wearable Products Continue to Grow in Popularity & Functionality 6
... biologists are part of an international research team whose ... Arctic lake provides compelling evidence of unprecedented environmental changes ... findings show that the last several decades have been ... Michelutti, a research scientist at the Paleoecological Environmental Assessment ...
... Physicists, chemists and engineers at the University of Pennsylvania ... of patchy particles, using charged, self-assembling molecules that may ... and perhaps be used in small batteries that store ... electrical charges of calcium ions just like the ...
... Md., October 20, 2009 New research focused ... use as well as increasingly popular botanicals is ... under its 2009� Fellowship Program. USP fellowships are ... or other health care/scientific doctoral or post-doctoral programs ...
Cached Biology News:Queen's scientists on international team discover 'ecologically unique' changes in Arctic lake 2Penn team uses self-assembly to make molecule-sized particles with patches of charge 2New research examining essential drugs, emerging botanicals supported by USP Awards 2New research examining essential drugs, emerging botanicals supported by USP Awards 3
(Date:7/31/2015)... , July 31, 2015 China Cord ... China,s leading provider of cord blood ... cell storage services, today announced that the Company has ... U.S. Securities and Exchange Commission. The filed Form 20-F ... March 31, 2015. The Form 20-F can be accessed ...
(Date:7/30/2015)... ... ... Ralco is honored to announce that it is the primary sponsor of the ... in Marshall. The Ralco Enrichment Center is an interactive experience where the public can ... lives. This unique exhibit also features a birthing center for fair goers to watch ...
(Date:7/30/2015)...   GenoSpace , a leading provider of ... of genomic and other biomedical data, today announced ... company as Vice President of Sales and Marketing. ... "GenoSpace partners with its customers to ... explore complex sets of genomic, phenotypic and other ...
(Date:7/30/2015)... ... July 30, 2015 , ... The 2015 Market Research Report on the ... state of the global Propanol market with a focus on the Chinese situation. Major ... Mitsui Chemicals, Oxea, ISU Chemical, Sanofi, Royal Dutch Shell, LG Chem and Zhejiang Xinhua ...
Breaking Biology Technology:China Cord Blood Corporation Files Its Annual Report on Form 20-F 2Ralco Announces Primary Sponsorship of Ralco Enrichment Center at Lyon County Fair 2GenoSpace Introduces Matthew Fischer as Vice President of Sales and Marketing 2Global Propanol Market Technical Data and Manufacturing Analysis 2020 2Global Propanol Market Technical Data and Manufacturing Analysis 2020 3
This adapter allows the Thermo-Fast® 96 Semi-Skirted (AB-0900 and AB-0990) PCR plates to be used directly in the ABI PRISM® 3100 sequencer without the need for software changes....
cystatin A (N-18)...
Human Cystatin A MAb (Clone 224705)...
...
Biology Products: