#543 What is lichen?

What is lichen? Lichen is not an organism. It is a symbiotic relationship between fungus and algae. There is some argument that the relationship is mutually beneficial, but there is another argument that the fungi are farming the algae. There are about 20,000 different species of lichen and they cover approximately 8% of the land […]

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#536 How is Easter calculated?

How is Easter calculated? Easter is the first Sunday after the full Moon that occurs on or after the spring equinox. When to celebrate Easter is a problem that has taxed the church for centuries. The date of Easter is very important for the Christian church because the whole religion revolves around the birth and

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