Science Facts Set-21

• There are about 600 species of oak trees on Earth.
• Wild male yaks weigh up to 1,000 kilograms.
• The Golden Poison Frog is the most poisonous vertebrate in the world.
• The atmosphere of planet Mercury contains about 42% of molecular oxygen.
• Prawns have claws on their legs. They have three pairs of legs.

• Yeast is a fungus that makes carbohydrates undergo fermentation.
• Human brain is considered to have about 50-100 billion neurons (nerve cells).
• Actinium was discovered by Andre-Louis Debierne, a French chemist.
• Lung Cancer is a disease caused mainly by smoking.
• Bee-eaters are birds that predominantly consume insects especially bees and wasps. There are about 26 species of bee-eaters on Earth.