Hiking is a hobby or sport where people go on long walks, usually through fairly remote or wilderness areas. The person in the picture has hiked to the top of a mountain.
Lansing is the capital of Michigan in the United States of America. It has a population of around 550,000 people.
Layering is a technique for propogating plants. It works best for plants that grow roots slowly, and plants that would naturally grow roots where a stem touches the ground.
To layer a plant, you usually take a stem and bend it down towards the ground, or into a pot, and hold it in place. You damage the stem where it touches the ground by cutting it part way through, adding some rooting hormone if you want. After some time, the plant will grow roots and shoots at the cut and it can be removed from the parent plant.
Layering can also be done in the air by cutting a stem part way through, adding the rooting hormone, and bundling up some damp potting soil or peat moss around the cut. The plant will grow roots into the bundle of soil, and then it can be removed from the parent plant. This works best with plants that aren't flexible enough to be bent to the ground.
Scientific name: lemmus lemmus
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Lightning is a discharge of static electricity during a thunderstorm. Thunder is actually the sound of the lightning, but if you are a long way away from the lightning it may take a while for the thunderclap to reach you.
Lightning is caused by a similar process to being 'zapped' when you touch a car after a drive, or if you scuff your feet along carpet and then touch someone. Lightning is on a much larger scale though, and being hit by lightning can kill you.