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.
Italian ryegrass is a winter annual or biennial grass that sometimes behaves as a short-lived perennial. Perennial ryegrass, on the other hand, is a short-lived perennial that behaves like an annual or biennial under poor conditions. Both grasses are found throughout California to about 3300 feet (1000 m), except in deserts and the Great Basin. Ryegrasses inhabit agricultural land and other disturbed areas.