Leonardo Da Vinci had no children but he has relatives. 

A new study shows how many and corrects some genealogical errors and documents the continuous male line, from father to son, of the Da Vinci family (later Vinci), from progenitor Michele (born 1331) to grandson Leonardo (6th generation, born 1452) to today; 21 generations in all, including five family branches. It identifies 14 living descendants.

Leonardo himself had (at least) 22 half-brothers but no children. The five family branches are traced from Leonardo's father, ser Piero (5th generation), and half-brother Domenico (6th). Since the 15th generation, data have been collected on over 225 individuals. 

Gold should be uniformly scattered throughout the Earth's crust, not in giant deposits, because it is unreactive. It is one of the most inert metals in the whole Periodic Table, it doesn't easily react with other substances, so it should not have come together in sufficient quantity to mine.

Yet it did, and became prized for its purity and stability and later for its rarity. It's still rare. The World Gold Council estimates that all the gold ever mined in the world would fit into a 20x20x20-meter cube. 

Chemists may have found an answer as to why it should not form into deposits yet did, and it may also explain why many gold miners were at risk from arsenic poisoning.

At an archaeological site in the City of David in Jerusalem, scholars have found an unexplained cache of fossilized shark teeth in an area where there should be none - nearly 40 miles from where they should have naturally occurred nearly 3,000 years ago, just after the death of King Solomon.

Since the teeth were from 66,000,000 years ago, Late Cretaceous, The answer would seem to be simple; they were fossilized, found, and then moved. But why? Did did the owners know they were ancient fossils?

Two new gravitational-wave events, dubbed GW200105 and GW200115, were detected on Jan. 5, 2020, and Jan. 15, 2020, but they happened 900,000,000 years ago.

It took that long for the gravitational waves from two black holes gobbling up their neutron star companions to finally hit Earth.

This first-ever detection of a black hole merging with a neutron star occurred during the second half of the LIGO and Virgo detectors third observing run, called O3b. Although multiple observatories carried out several follow-up observations, none observed light from either event, consistent with the measured masses and distances.

Most people don't recall the LinkedIn data breach from nine years ago, the Adobe customer cyber attackers from eight years back, that Equifax exposed private information of millions of people just four years ago.

Those are the high profile ones but most participants in a recent University of Michigan study remained unaware that their email addresses and other personal information had been compromised in five data breaches on average. Most breaches never make the news, and often they involved little or no notification to those impacted. 

The popular belief is that sexual activity must have declined during the pandemic, but that relies on the trope that young people go to bars and sleep with strangers and that lessened.

Some people were instead getting busy during the pandemic more than ever before. Older men with erectile dysfunction prescriptions. The qualifier "prescriptions" is because the number of men using them dwarfs the cases of actual erectile problems, the pill just makes it better.

In a review of National Sales Perspective data, the researchers found that sales of prescription daily-use erectile dysfunction drugs, such as tadalafil, soared after March 2020, when the country went into the nationwide lockdown.