Which continent can lay claim to the highest and lowest points on the planet

Scientist believe that earths core is around 6000°c where does this heat come from

What are seismic dampers and why are they important?

One of the brightest comets of the 20th century was comet hyakutake, which passed close to the sun in early 1996. the orbital period of this comet is estimated to be about 30,000 years. find the semi-major axis of this comet’s orbit. compare it to the average sun-pluto distance and to the distance to alpha centauri, the nearest star to the sun, which is 4.3 light-years distant.