Why is the sky dark at night? You might think the answer is obvious - the sun isn't up! But the only reason the sky looks blue during the day is that sunlight scatters off of the atmosphere -...
You are about to learn one of the biggest secrets in the history of the world. It's a secret that has huge effects for everyone who lives on this planet. Most people can feel deep down that...
la plimulto de niaj klimaton tie sur tero havas estis amika por la lastaj mil jaroj sed dum la plimulto de la pasintaj tri milionoj jaroj poste estis multe pli malvarmaj ol nun kaj la regionoj kie la...