Polyunsaturated fats are lipids in which the constituent hydrocarbon chain possesses two or more carbonâcarbon double bonds. Polyunsaturated fat can be found mostly in nuts, seeds, fish, algae, leafy greens, and krill.
Lava flow during a rift eruption at Krafla, Iceland in 1984. Lava is the molten rock expelled by a volcano during an eruption and the resulting rock after solidification and cooling. This molten rock is formed in the interior of some planets, including Earth, and some of their satellites. The source of the heat that melts the rock within the earth is geothermal energy.
About 90 percent of the volcano is covered with lava flows less than 1,100 years in age. Mauna Loa, the largest volcano on Earth, has erupted 33 times since 1843. The most recent eruption in 1984 lasted 22 days and produced lava flows which reached to within about 7.2 km (4.5 miles) of Hilo, the largest population center on the Island of Hawaiâi. Lava flows less than 4,000 years old cover about 90 percent of the volcano. HualÄlai, the third most active volcano on the Island of Hawaiâi, has erupted three times in the past 1,000 years and eight times in the past 1,500 years.