The Horsetail is usually found in the northern hemisphere We can usually found it in a close proximity to wetlands or water such as rivers to a height of 1800m It is a herbaceous perennial plant with...
Equatorial Coordinate Measures How can we measure the position of a body in the globe? What in heaven? Before studying the systems used in astronomy to fix the position of the objects on the celestial...
En nuestro planeta, tenemos dos regiones polares: el Ártico, cuyo nombre proviene de del griego "arktikós", del norte, y el Antártico de "antarktikós", opuesto al...