Andrew Freedman 20 hours ago
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Mapped: Where lightning strikes the most

Adapted from Vaisala data; Map: Harry Stevens/Axios

Every second on Earth, 100 lightning bolts strike the planet. That's about 8 million strikes per day, and 3 billion a year, on average. But as this map of nearly 9 billion lightning strikes shows, lightning is not evenly distributed around the world.

The bottom line: Each continent, except for the frozen reaches of Antarctica, has lightning hotspots — usually the parts that have clashing air masses or mountains. Spin the map and see where you're at the greatest risk of getting zapped.

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Scientists call for renewed talks on human embryo research limits

Illustration: Rebecca Zisser/Axios

Scientists and ethicists are urging further debate on the current 14-day limit over research on human embryos.

Why it matters: Some scientists, speaking with Axios and others at an event hosted by Rice University's Baker Institute Wednesday, say expanded research on early embryo development would provide untapped insight into how humans, and their diseases, develop.

Peter Hotez 10 hours ago
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Expert Voices

Measles makes alarming return to Europe and the Americas

Adapted from an ECDC report; Map: Harry Stevens / Axios

Measles epidemics have surged in the past year, according to a new report from the European Centre for Disease Prevention and Control (ECDC) and one from the Pan American Health Organization.

The details: Between April 1, 2017, and March 30, 2018, there were more than 14,000 measles cases across Europe, led by Italy (4,448 cases), Romania (3,243), and Greece (2,400). The vast majority (84%) occurred among people who did not receive their measles vaccination, while only 4% of the cases were imported. In the latest dire development, more than 9,000 cases were reported in Ukraine in the first 13 weeks of 2018.