Sumatra is Indonesia's largest island, at least if you count those that are not shared with other countries.

Sumatra once had large primary forests that were home to animals such as the Sumatran tiger, Sumatran elephant, Sumatran rhino, and orangutan. All of these species are currently threatened with extinction due to the policy of large-scale deforestation to plant the infamous oil palm trees.

The island has about 58 million inhabitants, the vast majority of whom are Muslims, but there are more Christians than Hindus.

Sumatra is also of volcanic origin and Lake Toba, 100 km long and 35 wide has taken the place of the crater of a super volcano whose last eruption dates back 75,000 years.

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