sun may determine lifespan at birth
Last Updated : GMT 06:49:16
Arab Today, arab today
Arab Today, arab today
Last Updated : GMT 06:49:16
Arab Today, arab today

Demographic data of Norwegians born

Sun may determine lifespan at birth

Arab Today, arab today

Arab Today, arab today Sun may determine lifespan at birth

Solar activity
Paris - Arab Today

Could the Sun be your lucky -- or unlucky -- star?
In an unusual study published Wednesday, Norwegian scientists said people born during periods of solar calm may live longer, as much as five years on average, than those who enter the world when the Sun is feisty.
The team overlaid demographic data of Norwegians born between 1676 and 1878 with observations of the Sun.
The lifespan of those born in periods of solar maximum -- interludes marked by powerful flares and geomagnetic storms -- was "5.2 years shorter" on average than those born during a solar minimum, they found.
"Solar activity at birth decreased the probability of survival to adulthood," thus truncating average lifespan, according to the paper published in the journal Proceedings of the Royal Society B.
There was a stronger effect on girls than boys, it said.
The Sun has cycles that last 11 years, give or take, from one period of greatest activity or solar maximum, to the next.
Solar maxima are marked by an increase in sunspots, solar flares and coronal mass ejections that can disrupt radio communications and electrical power on Earth, damage satellites and disturb navigational equipment.
Solar activity is also linked to levels of ultraviolet radiation-- an environmental stressor known to affect survival and reproductive performance, possibly by causing cell and DNA damage, according to the study authors.
- Fertility reduced -
The team, from the Norwegian University of Science and Technology, based their study on demographic data from church records of some 8,600 individuals from two different mid-Norwegian populations, one poor and one wealthy.
This was matched to maps of historical solar cycles.
On top of lifespan, being born in a solar maximum period also "significantly reduced" fertility for women born into the poor category, but not for wealthier women or for men, said the authors.
"We show for the first time that not only infant survival and thus lifespan but also fertility is statistically associated with solar activity at birth," they wrote.
It was not clear whether the same would necessarily hold true for people born in the modern era.
One explanation could be ultraviolet-induced degradation of the B vitamin folate, a shortage of which before birth has been linked to higher rates of illness and death, the team theorised.
"Our findings suggest that maternal exposure to solar activity during gestation can affect the fitness of female children," the authors wrote.
"The effect of socio-economic status on the relationship between solar activity and fertility suggests that high-status pregnant women were better able to avoid the adverse effects of high solar activity" -- possibly by staying out of the Sun or because a healthier diet curbed the harm.
The team did not have data about how early or late into a solar maximum event the children were born -- a limitation of the study.
And they could not fully distinguish between pre- or post-natal exposure to ultraviolet light.
Further investigation is needed, they said, to test whether the results were repeated in people of different skin colours, and those living at different latitudes.
"This study is the first to emphasise the importance of UVR (ultraviolet radiation) in early life," the authors said.
"UVR is a global stressor with potential ecological impacts and the future levels of UVR are expected to increase due to climate change and variation in atmospheric ozone."
Source: AFP

arabstoday
arabstoday

GMT 12:07 2018 Friday ,12 January

Deep, buried glaciers spotted on Mars

GMT 05:16 2017 Sunday ,20 August

The history of solar eclipses

GMT 17:12 2017 Monday ,07 August

Al-Shawaifi reveals secrets of total solar eclipse

GMT 13:38 2017 Monday ,06 March

Prepares to give stargazers an eyeful

GMT 06:31 2015 Thursday ,04 June

Pluto's unruly moons

GMT 13:12 2015 Saturday ,09 May

Sheikh Sultan opens Sharjah Centre
Arab Today, arab today

Name *

E-mail *

Comment Title*

Comment *

: Characters Left

Mandatory *

Terms of use

Publishing Terms: Not to offend the author, or to persons or sanctities or attacking religions or divine self. And stay away from sectarian and racial incitement and insults.

I agree with the Terms of Use

Security Code*

sun may determine lifespan at birth sun may determine lifespan at birth

 



Name *

E-mail *

Comment Title*

Comment *

: Characters Left

Mandatory *

Terms of use

Publishing Terms: Not to offend the author, or to persons or sanctities or attacking religions or divine self. And stay away from sectarian and racial incitement and insults.

I agree with the Terms of Use

Security Code*

sun may determine lifespan at birth sun may determine lifespan at birth

 



GMT 22:50 2017 Tuesday ,12 December

Trump Jerusalem decision prompts protests worldwide

GMT 16:17 2017 Monday ,10 July

Al-Alami: They signed 17 agreements

GMT 03:34 2017 Wednesday ,22 March

Tillerson to skip NATO meeting next month

GMT 11:40 2016 Tuesday ,01 November

10 / 1 Almandin wins Melbourne Cup thriller

GMT 21:49 2016 Wednesday ,24 August

Azhar imam heads for Chechnya

GMT 14:43 2017 Wednesday ,04 October

Nissan suspected of forging inspection documents

GMT 21:24 2017 Tuesday ,10 October

Thai junta chief vows elections in November 2018

GMT 20:37 2017 Monday ,21 August

French presidency gives official role to Brigitte

GMT 16:09 2017 Friday ,17 November

Indonesia smugglers stuffed exotic birds in pipes

GMT 02:00 2017 Thursday ,16 November

Egyptian diva to face trial for disparaging a river

GMT 08:35 2018 Wednesday ,10 January

Bollywood star evicted from Paris flat over unpaid rent

GMT 10:19 2018 Monday ,08 January

Surgery death rates in Africa
Arab Today, arab today
 
 Arab Today Facebook,arab today facebook  Arab Today Twitter,arab today twitter Arab Today Rss,arab today rss  Arab Today Youtube,arab today youtube  Arab Today Youtube,arab today youtube

Maintained and developed by Arabs Today Group SAL.
All rights reserved to Arab Today Media Group 2021 ©

Maintained and developed by Arabs Today Group SAL.
All rights reserved to Arab Today Media Group 2021 ©

arabstoday arabstoday arabstoday arabstoday
arabstoday arabstoday arabstoday
arabstoday
بناية النخيل - رأس النبع _ خلف السفارة الفرنسية _بيروت - لبنان
arabstoday, Arabstoday, Arabstoday