Two crop circles recently appeared near the town of Ipuacu in the Brazilian state of Santa Catarina. What makes this even more interesting is that they were reported on the same day -- Nov. 2 -- according to Open Minds.tv.

The other eye-opening part of this story is that UFO researchers have offered a $20,000 reward to anyone who can show how the circles were faked.

And by fake, of course, they mean created by humans.

Crop circles are mysterious, elaborate designs that unexpectedly show up in farmers' fields seemingly overnight. Explanations have run the gamut of their being left here by UFOs; unusual weather patterns; military experiments; and the most accepted theory of the circles is that they're the work of highly artistic hoaxers.

Watch as UFO magazine founder, A.J. Gevaerd, gets a helicopter point of view of the crop circles:

In his YouTube description of the two circles, Gevaerd writes that "both figures are perfectly symmetrical...and that was confirmed by measurements." He notes the first crop circle is made up of 13 spirals somehow produced in a wheat field, and the second circle "is geometrically complex with rings, hexagon and spheres."

The first Brazilian circle was discovered around 7 a.m. on Nov. 2, followed a short time later by the second circle. A detailed report was made by Antonio Inajar Kurowski, a professor at the Criminology Institute of Parana.

Both circles were approximately 177 feet in diameter, the first one found about a half mile outside Ipuacu while the second was about two miles out of town.

See what it's like to walk through the second Brazilian crop circle:

"It is a ring, with the plants folded counterclockwise, and in its interior is a perfect hexagon image," Gevaerd describes the second circle on YouTube. "The intelligence that produced this phenomenon certainly wanted it to be seen, because it appears splendidly from the nearby highway."

In response to critics who quickly condemn the ground designs as the work of hoaxers, Gevaerd has announced that his publication will award $20,000 to anybody who claims to have made these crop circles and can show how they did it.