IT's A SCAM!! !
Western Union describes it on their website:
"Employment
The fraudster will send a check to the victim who has accepted a job. The check can be for multiple reasons such as a signing bonus, supplies, etc. The victim will be instructed to deposit the check and use the money for any of these reasons and then instructed to send the remaining funds to the fraudster. The check will bounce and the victim is left responsible."
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The mere fact that science may not yet adequately explain an object, event, or experience does not mean the immediate explanation should automatically default to a conspiratorial, extraterrestrial, paranormal, or supernatural cause.