When Earth and Mars are at their theoretically closest point of 54.6 million km, it would take a signal from Earth about 3 minutes to make the journey, and then another 3 minutes for the signals to get back to Earth.
Switchgrass is a hardy, deep-rooted, perennial rhizomatous grass that begins growth in late spring. It can grow up to 2.7 m high, but is typically shorter than big bluestem grass or indiangrass. The leaves are 30â90 cm long, with a prominent midrib.
Cheatgrass, also known as Cheat grass (two words), June Grass, Downy Brome, grass awn, or by the scientific name, Bromus tectorum L., is a common and invasive type of weed, found in many parts of North America. It is also called foxtail.