Hannah Osborne

During the Tunguska event, over 8 million trees covering an area of 830 square miles were flattened when an asteroid entered Earth's atmosphere.

The victim was surfing off the coast of South Australia when a shark dragged him under. Bits of wetsuit were later found.

The last caldera-forming eruption at Yellowstone "was much more complex than previously thought," according to the annual report about activity at the supervolcano.

The Sentinel-6 Michael Freilich satellite recorded Kelvin waves moving eastward across the Pacific — a phenomenon often considered a precursor to El Niño.

The shark Apristurus ovicorrugatus was identified as a new species over a decade after the first mystery egg cases were found in a Western Australian museum collection.

Oregon State Parks said several lancetfish have washed up on beaches in recent weeks in a highly unusual spate of strandings.

Heavy rain in Australia has led to an influx in venomous spiders being washed into people's swimming pools. Species found include funnel-web spiders, the venom of which is so toxic it can kill a child in just 15 minutes.

A pair of orcas off the coast of South Africa have been ripping open sharks and feasting on their livers for the last eight years. A great white shark that survived an attack by the serial killer brothers has now been identified through huge scars across its massive body.

A severe geomagnetic storm from a huge hole in the sun's corona caused a massive disturbance in Earth's magnetic field. The surprise event sparked auroras as far south as Alabama and northern California.

A draft paper by a Harvard scientist and the head of the Pentagon’s UFO office has raised the idea an alien mothership could be in the solar system, sending out tiny probes dubbed "dandelion seeds" to explore the planets within.