Some 252 million years ago, Earth almost died.

In the oceans, 96 percent of all species became extinct. It’s harder to determine how many terrestrial species vanished, but the loss was comparable.

This mass extinction, at the end of the Permian Period, was the worst in the planet’s history, and it happened over a few thousand years at most — the blink of a geological eye.

On Thursday, a team of scientists offered a detailed accounting of how marine life was wiped out during the Permian-Triassic mass extinction. Global warming robbed the oceans of oxygen, they say, putting many species under so much stress that they died off.

And we may be repeating the process, the scientists warn.

joboggi wrote:Elon Musk (@elonmusk) Tweeted:
Stainless Steel Starship https://t.co/rRoiEKKrYc https://twitter.com/elonmusk/status/107 ... 93376?s=17

And the metal is stainless steel.

joboggi wrote:

joboggi wrote:Elon Musk (@elonmusk) Tweeted:
Stainless Steel Starship https://t.co/rRoiEKKrYc https://twitter.com/elonmusk/status/107 ... 93376?s=17

And the metal is stainless steel.

They are concerned about the strength of the rocket over time and not the weight.

Otherwise they would use aluminum.

Steel is inexpensive.

An inexpensive rocket build.

No one uses steel for rocket bodies.

Earth’s magnetic poles can wander several kilometers every year, however, the north pole's movement has become increasingly stranger in recent years. For reasons that are currently unclear, the magnetic north pole seems to be increasingly slipping away from Canada and towards Siberia at an erratic rate, according to a news report in Nature.