Science news of June 11, 2021 is:

In archaeology: the birth of the 99 million year old snail.

• This is a very rare piece of amber that was recovered in Burma.
• This allows motherhood to be documented in Cretaceous snails.
• Also called gastropods, they are 99 million years old.

E nature: degradation of living things and climate change, the two main challenges for humanity according to scientists.

• The two main challenges facing humanity are the degradation of life and climate change.
• This information comes from a joint report of scientific groups on climate and biodiversity.
• Climate and nature are closely intertwined, whereby disturbance in one results in the other.

Originally: COVID-19: How much do all the virus particles in the world weigh?

• Researchers have succeeded in estimating the masses of all particles of SARS-CoV-2, the COVID-19 virus, that are present across the planet.
• The total mass of the Kovid-19 virus worldwide is between 100 grams to 10 kilograms.
• At the peak of infection, a person has between 1 and 10 micrograms of virus particles.

In archaeology: 1000 years later, two Viking warriors of the same family reunite in Denmark.

• In the early 11th century, one of the Viking warriors died of head injuries in England and was buried in a mass grave in Oxford.
• The second warrior died in Denmark.
• Separated for 1,000 years, these two Viking warriors from the same family were reunited at the National Museum of Denmark in Copenhagen on June 9, 2021.

Among the animals: Wolves born in Colorado for the first time in 80 years.

• Colorado announced the birth of its first litter of gray wolves in 80 years on its soil in early June 2021.
• This is a major step forward for efforts to reintroduce the species in this western US state.
• About 250,000 wolves inhabited the country during the 20th century before European settlers launched extermination drives.