What is the answer to this riddle?: what walks on four feet at the morning and two in the after noon and three in the evening?

What are the main types of stem cell and where do they come from

Today, Aborigines represent about what percentage of Australia A. 2.5 B. 10.5 C. 25 D. 40

Most of northern Chile is dry mountainous terrain. True or False?

Why when iron rusts theres no more electricity

Which continents form the boundary of the Mediterranean Sea?

Which resources are important to the economies of many countries in Siberian Russia, Central Asia, and the Caucasus region? A. oil B. timber C. diamonds D. coal

In a short paragraph, explain the various waves of immigration to the United States. What groups were part of each of these waves?

What is a fault? A. the name for two opposing forces B. a type of crust that moves under heavier crust C. a crack in Earth's crust where movement occurs D. a volcanic region where new material is being created

How many plug-in hybrids does Obama want to see on the road in the next 6 years? 100,000 500,000 1 million 2 million

What is the difference between weathering and erosion?