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.
This grass reaches just 2 to 5 feet. This easygoing and versatile ornamental grass is a good choice for wet conditions, drought or partial shade, as long as itâs planted in moist, well-draining soil. Growing narrow and upright with a cloud of seed heads in fall, switchgrass can reach more than 5 feet tall.