Safety tip

 If you ever find a huge wormhole through time in the middle of your farm property, make sure to take careful measurements before attempting to cover it with a tarp or pieces of plywood. If you don't have access to surveying tools such as a rangefinder, tie the end of a roll of twine to a spike driven in the ground and walk around the hole to the side opposite the spike to get the diameter. Simply mark the twine where the hole ends and take the twine back to the workshop to build the first board across the hole. You might want to get someone to help you, but it's up to you.