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A large crack, stretching several kilometres, made a sudden appearance recently in south-western Kenya.The tear, which continues to grow, caused part of the Nairobi-Narok highway to collapse and was accompanied by seismic activity in the area.The Earth is an ever-changing planet, even though in some respects change might be almost unnoticeable to us. Plate tectonics is a good example of this. But every now and again something dramatic happens and leads to renewed questions about the African continent splitting in two.The Earth's lithosphere (formed by the crust and the upper part of the mantle) is broken up into a number of tectonic plates.These plates are not static, but move relative to each other at varying speeds, "gliding" over a viscous asthenosphere.Exactly what mechanism or mechanisms are behind their movement is still debated, but are likely to include convection currents within the asthenosphere and the forces generated at the boundaries between plates.These forces do not simply move the plates around, they can also cause plates to rupture, forming a rift and potentially leading to the creation of new plate boundaries. The East African Rift system is an example of where this is currently happening.The East African Rift Valley stretches over 3,000km from the Gulf of Aden in the north towards Zimbabwe in the south, splitting the African plate into two unequal parts: the Somali and Nubian plates.Activity along the eastern branch of the rift valley, running along Ethiopia, Kenya and Tanzania, became evident when the large crack suddenly appeared in south-western Kenya. 1624

A judge entered a plea of not guilty on Nikolas Cruz's behalf as the teen was arraigned Wednesday in last month's massacre at a South Florida high school -- on the same day students across the country walked out of class to demand stricter gun laws because of the killings.A Broward County grand jury last week?indicted?the 19-year-old gunman on 17 counts of premeditated murder in the first degree and 17 counts of attempted murder in the first degree. 476

A California man allegedly made a series of threats to Boston Globe employees in which he echoed President Trump's anti-press language.Robert D. Chain of Encino, California has been charged with one count of making threatening communications in interstate commerce, the US Attorney's Office for the District of Massachusetts said in a press release Thursday. Chain, 68, is due to appear in federal court in Los Angeles Thursday afternoon.The US Attorney's Office said Chain will be transferred to Boston "at a later date."Chain is accused of making several threatening phone calls to the Globe beginning almost immediately after the paper announced on August 10 that it was calling on newspapers across the country to publish editorials the following week standing up to Trump for referring to the press as "fake news" and "enemies of the people."According to court documents, on August 16, the day the editorial campaign was published in newspapers around the country, Chain made a call to the Globe's newsroom in which he said, "You're the enemy of the people, and we're going to kill every f***ing one of you. Hey, why don't you call the F, why don't you call Mueller, maybe he can help you out buddy. ... I'm going to shoot you in the f***ing head later today, at 4 o'clock."In another call allegedly made on August 22, Chain was asked why he was calling. According to court documents, he responded, "Because you are the enemy of the people, and I want you to go f*** yourself. As long as you keep attacking the President, the duly elected President of the United States, in the continuation of your treasonous and seditious acts, I will continue to threats, harass, and annoy the Boston Globe."More than 300 newspapers joined the Globe's initiative, with editorials running from coast-to-coast. In courting the other papers, the Globe proposed running the editorials to sound the alarm "on the dangers of the administration's assault on the press."Chain allegedly made at least 14 threatening phone calls to the Globe between August 10 and 22. He faces a charge that "provides for a sentence of no greater than five years, one year of supervised release, and a fine of 0,000," the US Attorney's Office said in its press release."Everyone has a right to express their opinion, but threatening to kill people, takes it over the line and will not be tolerated," said Harold H. Shaw, Special Agent in Charge of the Federal Bureau of Investigation, Boston Division, said in a statement. "Today's arrest of Robert Chain should serve a warning to others, that making threats is not a prank, it's a federal crime. All threats are taken seriously, as we never know if the subject behind the threat intends to follow through with their actions. Whether potentially hoax or not, each and every threat will be aggressively run to ground."The-CNN-Wire 2854

A locked-down pandemic-struck world cut its carbon dioxide emissions this year by 7%, the biggest drop ever, new preliminary figures show.The Global Carbon Project, an authoritative group of dozens of international scientists who track emissions, calculated that the world will have put 37 billion U.S. tons (34 billion metric tons) of carbon dioxide in the air in 2020. That’s down from 40.1 billion US tons (36.4 billion metric tons) in 2019, according a study published Thursday in the journal Earth System Science Data.Scientists say this drop is chiefly because people are staying home, traveling less by car and plane, and that emissions are expected to jump back up after the pandemic ends. Ground transportation makes up about one-fifth of emissions of carbon dioxide, the chief man-made heat-trapping gas.“Of course, lockdown is absolutely not the way to tackle climate change,” said study co-author Corinne LeQuere, a climate scientist at the University of East Anglia.The same group of scientists months ago predicted emission drops of 4% to 7%, depending on the progression of COVID-19. A second coronavirus wave and continued travel reductions pushed the decrease to 7%, LeQuere said.Emissions dropped 12% in the United States and 11% in Europe, but only 1.7% in China. That’s because China had an earlier lockdown with less of a second wave. Also China’s emissions are more industrial based than other countries and its industry was less affected than transportation, LeQuere said.The calculations — based on reports detailing energy use, industrial production and daily mobility counts — were praised as accurate by outside scientists.Even with the drop in 2020, the world on average put 1,185 tons (1,075 metric tons) of carbon dioxide into the air every second.Final figures for 2019 published in the same study show that from 2018 to 2019 emissions of the main man-made heat-trapping gas increased only 0.1%, much smaller than annual jumps of around 3% a decade or two ago. Even with emissions expected to rise after the pandemic, scientists are wondering if 2019 be the peak of carbon pollution, LeQuere said.“We are certainly very close to an emissions peak, if we can keep the global community together,” said United Nations Development Director Achim Steiner.Chris Field, director of the Stanford Woods Institute for the Environment, thinks emissions will increase after the pandemic, but said “I am optimistic that we have, as a society learned some lessons that may help decrease emissions in the future.”“For example,” he added, “as people get good at telecommuting a couple of days a week or realize they don’t need quite so many business trips, we might see behavior-related future emissions decreases.”___Follow AP’s climate coverage at https://www.apnews.com/Climate___Follow Seth Borenstein on Twitter at @borenbears .___The Associated Press Health and Science Department receives support from the Howard Hughes Medical Institute’s Department of Science Education. The AP is solely responsible for all content. 3048

A magnitude 6.8 earthquake struck northwest of Canada's Vancouver Island late Sunday, according to the United States Geological Survey. It was one of a trio of earthquakes to occur in quick succession on the same fault line.The US Geological Survey said the preliminary 6.6-magnitude earthquake was 6.8 miles deep, about 135 miles southwest of Port Hardy, a town on the northeastern end of Vancouver Island. It occurred at 10:39 p.m. local time (1:39 a.m. Monday ET), according to the USGS.The 6.8-magnitude quake came about 35 minutes later and was centered about 12 miles closer to Port Hardy at a depth of about 6 miles, the USGS said.An aftershock, registering a magnitude of 6.5, followed about six minutes later, the USGS said.The USGS did not predict damage from the quakes,?forecasting they would be felt only lightly. There was no tsunami threat, the Pacific Tsunami Warning Center said.CNN meteorologist Robert Shackelford said the three earthquakes were all part of the same fault line. 1010

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