The Techniques Used To Find And Study Exoplanets

Why science says having a younger sibling can be really good for you

Despite all the aggravation.

Anyone with a younger brother or sister knows it’s not always an easy ride (unless you happen to be very fortunate), but a new study suggests there could be real, tangible health benefits to having a younger sibling. Researchers have linked having a little brother or sister to a lower risk of obesity in a comparison of the body mass indexes (BMIs) of 697 children in the US.

The University of Michigan team found that the birth of a sibling between the ages of two and four was associated with a healthy BMI, while those without a sibling by the first grade (age six) were almost three times more likely to be obese at that age. Those are quite dramatic findings, but the researchers behind them aren’t entirely sure why such a link exists.

“This study is believed to be the first to track subsequent increases in BMI after a child becomes a big brother or sister,” said senior author Julie Lumeng. “Research suggests that having younger siblings - compared with having older or no siblings - is associated with a lower risk of being overweight. However, we have very little information about how the birth of a sibling may shape obesity risk during childhood.”

Solar Power Explorers

Staring at the sun does make you go blind. The lens in your eye concentrates the sun’s rays, which burn a permanent blind spot into your retina- just like ants under a magnifying glass. This effect is amplified during a solar eclipse.

It’s called solar retinopathy.

Source

Rowing robot powers itself by gulping dirty water

This is your closest look yet at a Kuiper Belt object

Scientists Grow Vocal Cord Tissue in a Lab for the First Time, and It Produces Sound

Scientists in the University of Wisconsin-Madison have successfully grown functional vocal cord tissue in a laboratory - yes, vocal cords that work. This remarkable new tissue engineering technique could, someday, be used to restore the voices of patients who have certain voice disorders that are (at the present junctures) untreatable.

Read more at: http://futurism.com/links/scientists-grow-vocal-cord-tissue-in-a-lab-for-the-first-time-and-it-produces-sound/

Glowing bandages can reduce the chances of antibiotic-resistant bugs

Australia’s using drones to protect its coasts from sharks

Where did the stars go?

One day, you find time to get out of the clutches of your work life and you decide to gaze at the stars. 

Something which you used to do when you were a kid. 

But the city life with all its glory has diverted you to other ‘fun’ things.

But to your amazement you find that the density of stars has drastically decreased.

‘That’s preposterous’- you say to yourself. That can’t be true.

You are positive that it has something to do with you aging.

You decide to go to your eye doctor and do a thorough check up. The doctor concludes that your eye sight is perfect.

You are delighted,  knowing that your eye sight is perfect and that you are going to see those stars again. You spend all day lamenting about it. 

You crave for the starry night sky. And you are sure it would look like so :

So, the following night you go to the terrace to rejoice at the sight. But yet see that the sky is not starry at all as you had marveled. 

In fact, there is a stark difference between what you had in mind and what you observe.

You get increasingly concerned about it. You ask a few people around and you find out that the answer to this mysterious phenomenon is Light Pollution..

And you start to explore this new bizarre form of pollution.

What is Light Pollution?

Alteration of natural light levels in the outdoor environment owing to artificial light sources.

What does it do?

The impact of light pollution is to reduce our eye’s limiting magnitude. That means that we can see fewer and fewer stars.

The differences in the number of stars that can be seen due to varying levels of background light pollution.

Light pollution competes with starlight in the night sky for urban residents, interferes with astronomical observatories, and, like any other form of pollution, disrupts ecosystems and has adverse health effects.

Light pollution is a side effect of industrial civilization. Its sources include building exterior and interior lighting, advertising, commercial properties, offices, factories, streetlights, and illuminated sporting venues. 

How can I prevent it?

(Light Pollution and How to Reduce It)

The solution does not involve curtailing nightlife, hampering the nighttime economy or compromising safety. It just requires directing lights where they’re needed and eliminating waste.

Here what you can do prevent light pollution.

1) Only turn on outdoor lights when needed—or install motion sensors.

2) Point the lights downward and outfit them with “shields” to prevent light from traveling sideways. The goal is to shine them only where illumination is wanted—not in people’s eyes or on other people’s property (a case of “light trespass”).

3) Lower the wattage of your bulbs and put them on dimmers. Bright lights and dark shadows don’t improve safety, but reduce it.

4) Close curtains at night to keep indoor light in. If you live in a multi-story building, use black-out curtains to prevent bird crashes.

And, of course, please use energy-efficient lights to cut global warming emissions even more than you’ll be doing already.

Inspiration :

Here’s what the night sky looks now, with light pollution.

And here’s how it will look like without it.

This post is to educate all the followers of the blog about Light Pollution, and raise awareness about it.

“Stars can’t shine without Darkness”

and hence i urge you to do your part to curbing Light Pollution.

Have a good day :)

PC: NASA, classroomclipart, Umut Siliman, eschooltoday,medscape

The world’s oldest known fossils have been found - and they’re 3.7 billion years old

They could push back evidence for life on Earth by 220 million years.

The oldest fossils ever discovered have been found in Greenland, and they appear to have preserved the earliest signs of life of Earth.

Dated to around 3.7 billion years ago, the fossils contain evidence of stromatolites - layers of sediment packed together by ancient, water-based bacterial colonies - and could push back the origins of life in the fossil record by 220 million years.

Read more…