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2014-07-31 Astronomy - Planets' Atmospheres:

The primary reason that Mercury and Mars do not have atmospheres is that they are too small to hold onto one. There is a detailed though incomplete discussion of this on my website at http://cseligman

2014-07-30 Entomology (Study of Bugs) - wasp or bee?:

Hi Carla   This is a solitary wasp. It is a female Cicada Killer  in search of prey. They are not aggressive. Have you had some cicadas hatch there lately. Once she capture he prey she will bury it in

2014-07-30 Entomology (Study of Bugs) - Leafhopper ID:

Dear Jonathan - This is a type of leafhopper (Hemiptera/Auchenorrhyncha: Cicadellidae) known as a sharpshooter (subfamily Cicadellinae). It looks to me more like a member of the genus Oncometopia than

2014-07-30 Geology - Questin about fossil shells.:

Dario,    Paleontology had always been my weakest link with the subject of Geology! My regrets for not being of any help.    However, the photographs are also not very clear. The best thing for you is

2014-07-30 Entomology (Study of Bugs) - new type of wasp:

Hello Dustin,    You have Four-toothed Mason Wasps (Monobia quadridens), and yes they can inflict some pain. Often they are not nuisances and will leave you alone. However, the swelling your father experienced

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