Home


Comments

Post a Comment

Popular posts from this blog

Did Earth Always have water ? A cosmic H2origin story.....

The Earth's is covered in water. That’s every last drop in the oceans, inclouds, in icecaps, in your body. And even less of that is fresh water. All that water together would fill a sphereonly 860 miles (about 1,385 kilometers) in diameter. Water is one of the things that makes Earthso special and without it, life as we know it couldn’t exist. Was our home always a waterpark? If not, how did it all get here? What do we really know about Earth’s H-two-Origins? [INTRO] The solar system formed when a cloud of gasand dust collapsed into a swirling disk. And at least some of that cloud was water. In the orbit where Earth would one day be,the young sun’s intense heat prevented water vapor from condensing on its own. But tiny grains of dust acted as ‘condensationnuclei’ to let droplets form. These tiny debris particles coalesced intoour young planet along with the water they carried. As Earth cooled, rocks in the crust reactedwith chemicals in the early atmosphere to create more wa...
Read more

How the moon control biological cycle

                     As far as we know, humans are the only livingthings that wear watches. But we aren’t the only ones that can telltime. Earth’s movement sets the rhythms of countlessbiological clocks. The 24 hour solar period winds cellular gearscontrolling sleep, hunger, and metabolism in creatures ranging from jellyfish to elephants. And our 365-and-a-quarter-day journey aroundthe sun regulates cycles of seasons, harvests, and migrations. But the phases of our planet’s nearest neighboralso have a surprising pull on biological rhythms. [OPEN] For many species the moon’s glow is a cuethat’s crucial to their survival. Vampires and emo teenagers aren’t the onlyones who find moonlight romantic. Lots of animals use the 29-and-a-half daylunar cycle to sync up when it comes to finding a mate.    Triggered by the full moon, impalas roar,which in turn triggers all their female mates to begin ovulation. Using a common signal lik...
Read more

Why we should put rockets on the moon

I'm here with Don Pettit youprobably recognize this guy. He's myfavorite astronaut that I know. Hold onJoe, you only know one astronaut. That'snot important, you're still my favorite. Last time thatI was here, we were hanging out, we were talking about how to drink coffee inspace and the cool invention that you made to do that, and and when we weredone I walked over here to this building to check out this thing. This is a Saturnfive. It made me think when I wassitting in here looking at the size of this thing, because until you're standingup next to this thing, you just do not have a sense of how massive the Saturn 5is. It took all of this to getjust this little bit to the moon and back. That's the command module. So why did ittake all of that to do this. That'scalled the rocket equation. Oh I was toldthere would be no math. So there’s a famous saying: the dinosaurswent extinct because they didn’t have a space program. But we do! Half a century ago, ast...
Read more