As many folks continue to look skyward in expectation of drone delivery services, they’re missing the development of an increasingly popular delivery technology back on terra firma.

Wheel-based delivery robots may not be quite as sexy as their flying counterparts, but with fewer regulatory hoops to jump through than drone services, the technology is likely to become more widely used sooner rather than later by companies looking to make their delivery operations more efficient.

The latest outfit to join the race is U.S. startup Refraction A.I. with its autonomous Rev-1 machine.

Read more here.