Earth Changes
Kevin Rimcoski took this photo from Mount Lemmon's Windy Point on Sunday night. Along with the stars and storms, Rimcoski's picture also captured red sprites. What are these and how do they form?
Red sprites are weak electrical discharges that can form directly above a decaying complex of storms. They occur roughly 50 miles above the Earth's surface. For perspective, most lightning strikes happen within a few miles above the Earth.
Red sprites are also triggered by positive lightning strikes. These are bolts that travel from the tops of the clouds down to the valley floors. Positive lightning strikes can be 10-100 times more powerful than their negative counterparts, due to the amount of required energy to travel through the atmosphere.

Shephard Ts'olo Lesofe secretly takes his sheep down to drink from the controversial Katse dam in Lesotho, which only provides water to South Africa
His country is suffering through its worst drought in 35 years, but the vast and vital water reserves remain out of reach, destined instead for export to neighbouring South Africa.
"I am very angry about that water, because it could benefit us, we could use it to water the crops when there is a drought. But that's not happening," the 65-year-old widower told AFP.
Kneeling in front of his round, thatch-roofed hut, he sorted through his maize, examining each grain, one-by-one.
The operation didn't take long. His total annual harvest filled just two large sacks, in place of the usual dozen.
According to the World Food Programme (WFP), the 2016 harvest for Lesotho's primary crop maize is estimated at 25,000 tonnes, a dramatic drop from last year's 78,000-tonne haul.
Instead, the mountainous kingdom - - entirely landlocked by South Africa - - must import food from its larger neighbour.

A Risso's dolphin is stranded in the mud near San Francisco International Airport on Tuesday, Aug. 9, 2016
A team from the center, along with the San Francisco Fire Department, retrieved the body of the dolphin Wednesday from the mudflats south of the airport, where the animal became stranded earlier this week.
An analysis of tissue and organ samples will help determine whether there was an underlying illness that caused the dolphin to stop eating. Risso's dolphins are rare visitors to San Francisco Bay. They typically make their home in the open ocean and travel in pods.

The Council for Geoscience is on its way to investigate this strange ground fire in Limpopo.
In July the Limpopo Provincial Disaster Management Centre (PDMC) received a call from the Sekhukune District Municipality regarding the emergence of unusual fire, mud and grey ash in a damp wetland area on the outskirts of the village.
"The PDMC visited the area to conduct rapid assessment. The assessment revealed that the smoke and fires started three weeks ago. There is hot mud and grey ash in the area and three people were burnt by hot ash," said PDMC spokesperson Michael Moja.
The fire has steadily burnt through an area larger than a rugby field, transforming the wetland into what looks like an active volcanic field. A community member, Mbusi Ka-Mphezulu, posted photos on Facebook of a lava-like substance glowing from underneath the ground.
Dallmer called Fulshear police, which in turn called a wrangler to remove the alligator. "It was a big one. We were surprised by how big it was," said Capt. Mike McCoy, Fulshear police. Dallmer recorded video on his cellphone, as a group tried to lasso a rope around the alligator's head. During the recording, the alligator could be heard hissing. It also opened its mouth in an attempt to defend itself.
Alligator sightings are common in Fulshear, as are removals, officials said. Still, this case was odd. "It's unique for an alligator this size. This alligator is quite big," Capt. McCoy said. The official measurement came in at 8 feet, 9 inches long, weighing upwards of 300 pounds.
"It's quite a story. No doubt about it," Doug Dallmer said, breathing a sigh of relief that he and his family are safe. The alligator will be taken to an alligator farm in El Campo, Texas, where it will live on a refuge, officials said. "That was our goal here," said McCoy. "Not to harm the alligator."

Emergency personnel put a victim onto a stretcher in Mansion Square Park in Poughkeepsie, N.Y., on Friday, after a powerful thunderstorm hit the park.
The most severly injured of the three unresponsive victims who had been taken to the trauma center at Vassar Brothers Medical Center in Poughkeepsie died Saturday around 1 a.m., a hospital spokesman, Tim Massie said. The man, who was not immedietely identified, was 50 years old, Mr. Massie said. The two others remained in the hospital's intensive care unit. All three were men in their late 40s to early 50s who had been sitting together on the same park bench, he said.
The other victims were taken to MidHudson Regional Hospital in Poughkeepsie. Their conditions were not immediately available.
At 4:50 a.m. on Tuesday, Kiyomi Abe, 77, suffered injuries to her head and back after she was attacked from behind by a bear in a field at her home in the Hachimantai area. After the woman let out a scream, the bear fled the scene along a national highway.
Ten minutes later, a bear scratched the right thigh of Taeko Abe, 75, in a field about 200 meters away from the first attack. In fleeing the area, the woman broke her left ankle after she jumped down from a height of 1.5 meters. The bear was last seen heading into a forest.
Police suspect that the same animal, measuring about one meter in length, attacked both women.

A Thai man died after he was attacked by a sun bear at a durian orchard near the Renok Baru Kesedar settlement
The body of Mat Didik@Madidi Basa, 40, was found by his son Muhamad Naim, 15, who went out to search for him about 6am.
District police chief Superintendent Rajab Ahad Ismail said the victim had gone out alone to the orchard about 10pm and most likely came across the bear.
"Villagers claimed that they had seen a bear prowling in the orchard. People have also spotted a bear eating durian on a tree. He could encountered the bear while he was collecting the durian and was attacked by the animal.
"There were slash wounds on his head," he said.
Meanwhile, Kelantan Wildlife director Mohamad Khairi Ahmad Said said the department received the information at 8.15am and has deployed five staff to investigate the incident.
Olivier Staiger explains: Wednesday, August 10th, 2016, I drove about 700km in the afternoon from Switzerland to Italy to chase a rare potential situation for waterspouts with Perseid meteors in the Adriatic Sea.
It's not uncommon for Colorado's highest mountains to record occasional summer snow.
Friday's temperatures started off in the 40s across the mountains with a few valleys dipping into the 30s.
Metro Denver saw overnight lows fall into the lower and middle 50s with a few upper 40s on the fringes of the city as reported by CBS4 Weather Watchers.










Comment: A couple of months ago other 'rare' red sprites were filmed bursting out of supercell storm in Texas. See also:
Red Sprites - A strange and beautiful form of lightning