50 篇博文 含有标签「自然科学」

Transcript of 绿色恒星找到了：为什么你却几乎看不到 （中文完整文稿）。

Transcript of 诺奖得主警告：宇宙膨胀对不上数 （中文完整文稿）。

It's estimated that tens of billions of dollars have been spent on quantum chromodynamics.

Here's a puzzle that sounds like a riddle. Electrons are among the most common things in the universe.

While you watch this you are spending energy. Your heart is squeezing roughly once a second. Your lungs are hauling air in and out.

Hey, it's Mark, I've got a chart for you.

Imagine watching a beam of sunlight travel all the way from the Sun to Earth.

No tape measure reaches another galaxy.

You've probably never seen an entirely accurate picture of the solar system in your entire life.

Point a telescope at a patch of sky near the constellation Bootis, and you'll be looking into a part of the universe where something is missing.

This is a map of the world's income groups, according to the World Bank.

Look up at the starry sky above on a dark, clear night.