- Carbon (from Latin carbo ‘coal’) is a chemical element; it has symbol C and atomic number 6. It is nonmetallic and tetravalent—meaning that its atoms are able to form up to four covalent bonds due to its valence shell exhibiting 4 electrons. It belongs to group 14 of the periodic table. Carbon makes up about 0.025 percent of Earth’s crust. Three isotopes occur naturally, 12C and 13C being stable, while 14C is a radionuclide, decaying with a half-life of 5,700 years. Carbon is one of the few elements known since antiquity.
- 2021 Suez Canal obstruction (Wikipedia)
In March 2021, the Suez Canal was blocked for six days by the Ever Given, a container ship that had run aground in the canal. The 400-metre-long (1,300 ft), 224,000-ton, 20,000 TEU vessel was buffeted by strong winds on the morning of 23 March, and ended up wedged across the waterway with its bow and stern stuck on opposite canal banks, blocking all traffic until it could be freed. Egyptian authorities said that “technical or human errors” may have also been involved. The obstruction occurred south of the two-channel section of the canal, so there was no way around it for other ships. The Suez Canal Authority (SCA) engaged Boskalis through its subsidiary Smit International to manage marine salvage operations. The blockage of one of the world’s busiest trade routes significantly slowed trade between Europe, Asia and the Middle East.