Sigma 150 vs Sigma 180

I have been using my Sigma 150 mainly for natural light shot for more than a year now and loving it. Just a few days ago, I acquired a pre-owned Sigma 180 so I thought I might do a little bit of side by side comparison of the two. Not on the IQ though. For that you can refer to a few excellent lens review sites such as Photozone, SLR Lens and Camera Review etc. I am mainly interested in what the

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UV Flashlights Comparison

Since I have three different UV flashlights, I thought it would be a great idea to do a side by side comparison of all three. Here are the three UV flashlights I have purchased so far. 1. Inova X5MT-WUVT High Powered Ultraviolet LED Flashlight US$40.45 2. Ubesta 3-in-1 15+1 3xAAA Flashlight US$11.563. UltraFire® 3w Ultraviolet LED Flashlight  US$7.46 First, I tested them, one by one, on a RM10
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Wormlion

I have seen similar pits under the hostel building when I was in Kuching, and again, in Tawau. I thought they were antlion pits at first, but upon investigation, turned out to be something else. No antlion larva inside, just a worm! See how this wormlion deals with an ant that falls into the pit! The worm looks like this: I posted the gif animation on my Facebook and within minutes, got the
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Butterflies and rainforest

Like most people, I like butterflies. (Who doesn't?:D). However, while i like them and think they are beautiful, I never really have very high regard for them. So the butterflies pollinate a few flowers, plants and crops, but they are no where as efficient as the bees in this aspect. I didn't realize how wrong I was until I stumbled upon this website: Langkawi-gazette Excerpt from the page:
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