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15 votes

Do I need a hard shell to ski in sunny weather conditions?

As a beginning skier you will probably be falling down a lot. This means that you are likely to end up covered in snow even if the weather is nice. If you are wearing a soft shell, the snow melting ...
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15 votes

How can I cover the upper part of my nose to avoid UV radiations?

As skin cancer is such a major issue in Australia, there is a huge range of products that shield the nose. From the Australian Cancer Council, see this one which clips onto your sunglasses as an ...
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14 votes

How can I cover the upper part of my nose to avoid UV radiations?

Zinc Oxide Paste Surfers use zinc oxide for the most burnable areas of the face, and it might work for you too. It's an opaque white paste that totally blocks harmful UV. It's not greasy like ...
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10 votes

Do I need a hard shell to ski in sunny weather conditions?

tl;dr I don't think you need spent big money on a new jacket just to go skiing if you have a serviceable soft shell. You can wear anything you want. I know when the ski season is coming to a close ...
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10 votes
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Does water in the sun get purified from or polluted by algae, fungi and bacteria?

I'm going to assume that you are employing the SODIS method of water sterilization. To sum up the details of the process, this method is where you fill plastic pop bottles, (PET), up with rather ...
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9 votes

How can I cover the upper part of my nose to avoid UV radiations?

Ski goggles. They're made for just that - blocking UV - and allow you to wear prescription glasses underneath. Did just this on several summer cycling and kayak trips. All day in full sun ones, ...
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7 votes

Do some parts of the world really have 12 hours of daylight each day of the entire year?

If you neglect the influence of the terrain/buildings, the atmosphere and the height above sea level, both the time with and without sunlight is very close to 12 hours on the equator (other minor ...
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  • 21.5k
7 votes

How can I cover the upper part of my nose to avoid UV radiations?

Some face shields also include nose protection, e.g. (mirror): Another option is using a UV face shield visor, e.g. (mirror): Good feedback on it in the comment section: That fancy visor doesn't ...
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7 votes

How can I cover the upper part of my nose to avoid UV radiations?

Thinking practically, how about just putting a bandaid on there? Or buying surfer’s sunblock that really sticks for a long time.
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6 votes
Accepted

What to look for in eco-friendly sunblock?

This article has a list of what chemicals to avoid, why, and some good sunscreen choices. The three main points are below. Note that titanium dioxide falls under physical sunscreen but is still ...
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  • 2,652
6 votes

Do I need a hard shell to ski in sunny weather conditions?

If I go skiing during sunny weather conditions, is it still recommended to use hard shells or could I get away with an insulated/soft shell jacket and pants? Yes you get away without hardshells ...
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6 votes
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Approximating the time remaining before sun is set and it starts getting dark

You can quickly determine how much time you have until the sun goes over the horizon using your hands. Hold your hand out in front of you at arms length, parallel to the ground, palm towards you. ...
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5 votes

Do some parts of the world really have 12 hours of daylight each day of the entire year?

Imagine for a minute that the Earth is perfectly spherical, that sunlight arrives "from infinity", and that any given spot is either lit or unlit. Then, at any given time, exactly half the surface is ...
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5 votes
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Has extended exposure to sunlight and UV in the arctic or antarctic ever caused someone's eyes to change color?

This did indeed happen to Robert Swan, who is the first man in history to walk to both the South and North Poles. His eyes turned from dark blue to light blue on his trek to the South Pole, which ...
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5 votes
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Would Mud Prevent Sunburn?

Yes, mud would work to give some protection from the sun, this is in fact exactly what rhinos and hippos do to protect their sensitive skin in the African safari. If I recall correctly mud protects ...
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  • 740
5 votes

Is parasol a good gadget to stay cool walking around the city and parks?

Parasols might be out of style in most countries, but they are still fairly popular in some Asian countries, where people try to get as little tan as possible. E.g. Japan and China. So I suppose they ...
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  • 3,474
4 votes

Would Mud Prevent Sunburn?

This could be effective. Anything opaque that blocks the sun's rays from reaching your skin will be effective at preventing sunburn, whether that's a hat, the shade of a tree, or a layer of mud ...
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4 votes

How to detect significant sun damage in a plastic molded kayak?

As long as it still flexes you're good to go. Part of the strength of polyethylene kayaks is in their flexibility, apart from colour loss, the most significant aspect of sun damage to the plastics ...
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  • 7,757
4 votes
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Are there any techniques to cooking food when camping in the wild by harnessing the energy of the sun?

Certainly, what you are looking for is a backpacking solar stove. Here are some examples. SunFlair Solar Oven SOLTAC's CookSack Or if you really wanted to, you could attempt to build one yourself.
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4 votes

Do I need a hard shell to ski in sunny weather conditions?

The question is really what you mean by sunny weather conditions ? Does it means the weather is hot or does it means the sun is shinning ? Because in winter, you can have a beautiful sunny sky and ...
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  • 191
4 votes

Is parasol a good gadget to stay cool walking around the city and parks?

The OP asks: How do I attain the ultimate parasol experience? First, get a beautiful parasol, one that Madame Butterfly would be proud to carry. Second, develop your evasive techniques, raising and ...
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  • 22.4k
4 votes

Approximating the time remaining before sun is set and it starts getting dark

This is a function of latitude and season. Apart from that, it depends on local landscape, weather, and your own eyes. On a rainy day in a dense forest, it may already be quite dark at sunset. On a ...
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  • 26.1k
3 votes
Accepted

Can I use sunlight to purify water without a special container?

PET (Polyethylene terephthalate) bottles are not "special" containers, they are the most widespread containers holding potable water in the world, with more than 100 million used per day. Now, you ...
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  • 10.6k
3 votes

Where in nature can we find examples of natural "hoods" - either for reducing UV / sun exposure or for providing shelter from rain?

Protecting against UV is usually done with a covering like fur, feathers, scales, a hard shell, etc, or pigment. Our own species is a great example of the latter. It seems we emerged on the plains ...
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  • 21.3k
3 votes

How to tell whether a particular pair of sunglasses will effectively protect your eyes?

"blinkers"/blinders (usually leather or plasic pieces that close the gaps at the side and top of sunglasses) effectively block diffuse, ambient, scattered and reflected light coming from the side (of ...
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2 votes

How can I cover the upper part of my nose to avoid UV radiations?

I would just use a small Band-Aid. Easily removed when no longer needed.
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2 votes

What is the difference between SPF and UPF, if any?

SPF and UPF both have very similar purposes. But the are metrics for different things - the first is for rating sunscreen creams, they latter is for apparel. The measurement method is different in ...
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2 votes
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What situations/locations would be ideal for using a solar stove while backpacking?

It seems to be that the only real requirement for solar cooking is sunshine and the more the better. There are a few disadvantage to cooking with solar energy. Disadvantages include: •weight, ...
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  • 9,534
1 vote

Do some parts of the world really have 12 hours of daylight each day of the entire year?

It is very close to a 12 hour day of light every day in the Southern Philippines. The mountains behind were I live have some effect on shorter afternoon. & the sun rises over the S Pacific. We ...
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