Comets
For years the crater - located near Ramgarh village, about 12 km east of Mangrol - has been considered as a 'meteorite impact' site, but the theory lacked unambiguous evidence. However, a study by geologist Satyanarayan Rana has found diagnostic evidence of 'meteorite impact' at the crater.
Rana, a research scholar at the department of geology, Mohanlal Sukhadia University (MSU), Udaipur, has found evidence in the form of shatter cones in sandstones, planar deformation features (PDFs) and planar fractures (parallel sets of multiple planar cracks) in quartz grains.
Shatter cones are rare geological features and are only known to form in the bedrock beneath meteorite impact craters or underground nuclear explosions. PDFs are also formed by extreme shock compressions on the scale of meteor impacts.
"This regional geological structure has invited the interest of various geologists throughout the world since its discovery and the past five decades have witnessed a number of theories on the origin of this structure, but the issue of origin remained debatable," the 33-year-old PhD researcher, who started his research in 2013 and he completed it in April this year.

Previously known as C/2017 U1 (PANSTARRS) and A/2017 U1, approaching from above, it was closest to the Sun on 9 September. Traveling at 44 kilometres per second, the comet is headed away from the Earth and Sun on its way out of the solar system.
Astronomers who have been observing this first-ever confirmed interstellar visitor have named it Oumuamua, which in Hawaiian means a messenger from afar arriving first.
Scientists are certain this 600-foot-long, pale pink asteroid or comet originated outside our solar system.
'I'm surprised by the elongated shape - nobody expected that,' said astronomer David Jewitt of the University of California, Los Angeles, who led the observation team that reported on the characteristics.
The Roodepoort Record reports that a local resident and his wife made an interesting discovery while reviewing their CCTV footage. The man wanted to assist his neighbour in Vuurlelie Street after their dog was poisoned, so he thought he would take a look at the footage.
While they might not have found information about the dog, they did discover a meteor shooting through the sky around 9PM on Sunday.
While it only lasted a few seconds, the sheer brightness and apparent proximity of the object should be enough to satisfy your curiosity.
You can see the video of the event below.

An Earth-bound asteroid would need to be spotted decades in advance if scientists are to have a chance of stopping a disaster.
As NASA's Planetary Defense Coordination Office uses the asteroid "2012 TC4" to test its ability to respond to the existential threat posed by Near Earth Objects (NEOs), we look at four methods the international community hopes could one day help us avoid going the way of the dinosaurs.

Comet Heinze (C/2017 T1) was only a tiny, 17th-magnitude patch of fuzz with a short, fan-shaped tail on October 22nd.
Heinze searches for near-Earth asteroids with the Asteroid Terrestrial-impact Last Alert System (ATLAS) project, and came across the comet in images taken on October 2nd. The survey uses two telescopes, one at Mauna Loa Observatory on Hawaiʻi Island, and a second on the summit of Haleakala on Maui, about 100 miles to the northwest. Among other benefits, two widely-spaced "eyes" allow for distance determination using parallax, which also helps in calculating a new object's orbit.

Comet PanSTARRS (C/2017 U1) raced within about 0.25 astronomical unit of the Sun in early September and is now relatively close to Earth. Based on its extreme orbit, astronomers believe it arrived here from interstellar space.
But an object swept up just a week ago by observers using the PanSTARRS 1 telescope atop Haleakala on Maui has an extreme orbit - it's on a hyperbolic trajectory that doesn't appear to be bound to the Sun. Preliminary findings, published earlier today by the International Astronomical Union's Minor Planet Center (MPC), suggest that we are witnessing a comet that escaped from another star.
"If further observations confirm the unusual nature of this orbit," notes Gareth Williams, the MPC's associate director, "this object may be the first clear case of an interstellar comet."

A security camera on the waterfront in St. John's captured this shot of a light falling from the sky near the South Side Hills, across the harbour.
"The whole sky just lit up," he said. "It was coming in on a 45 degree angle, coming down to the right."
Wilkins stopped eating and stared as the moving ball of light crashed down on the opposite side of the harbour, towards the largely uninhabited Southside Hills area.
He paused to determine if he could hear a crash, but the noisy chatter of the busy pub prevented him from hearing any sound the flash of light may have made.
"It was like a big green ball of fire, is what it looked like. At first I thought, 'Wow, geez, that's a really bright firework,' but fireworks don't shoot downwards."
Speaking to the Daily Mirror he said the explosion was known as a 'fireball explosion' and occurs after an asteroid enters the earth's atmosphere.
"The asteroid could be a size of 50 centimetres. Every asteroid enters the earth's photosphere at a speed of 65 kilometers per second. With that speed one side of the asteroid gets heated up due to friction and the other side does not, therefore causing an explosion," Prof Jayaratne said.
In July, astronomers discovered a brand new comet zooming through the inner regions of our space bubble. Since that time it's been steadily getting brighter, and now is about the best time to finally catch a glimpse of it in the night sky.
The comet C/2017 O1 ASAS-SN was first detected on 19 July by the All-Sky Automated Survey for Supernovae, the same system that brought us new discoveries about the mysterious Tabby's star, massive space explosions, and stars shredded by black holes.
Now, for the first time, the survey has discovered a comet which Northern Hemisphere stargazers can readily spot in the sky with the help of a backyard telescope or even just binoculars.
Comet O1 ASAS-SN is a long-period comet, and it probably takes at least several thousand years to cruise around the Sun and come back - so being able to spot it right now is a wonderful treat.
"I looked at my house and my windows, and everything looked fine, so I just walked right on by," Casselman said. "I didn't even pick it up."
The next day, Casselman's partner, Dennis Suszko, found a strange piece of rock in the front yard, and she remembered seeing a similar rock in the side yard.
"These were odd-looking rocks," Casselman said. "It wasn't like anything around it, and I jokingly said, 'We must've had a meteor shower last night.'"
As they looked for more pieces of rock, they noticed a chunk of shingles missing from the eaves of their roof.
"We're not positive, but we believe that's where the meteorite first struck before landing in the yard," Casselman said.