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Six digital wallets used by the Quadriga cryptocurrency exchange were expected to hold millions. But they were emptied out last April, "bringing the balances down to nil."

Climbers Tommy Caldwell and Kevin Jorgeson finished their historic first free climb on El Capitan's Dawn Wall in Yosemite National Park. Melissa Block talks with the duo about their 19-day effort.

A committee of experts examined about a dozen different synthetic biology technologies that could be potentially misused. For each, they considered how likely it was to be usable as a weapon.

Michael Honeycutt, the top toxicologist for Texas, is the latest chair of the EPA's science advisory board. But some scientists warn his views align more with industry than with scientific consensus.

The financial support mirrors the Texas community's efforts to support the mosque: Four churches and a synagogue have offered to host Muslim services.

In response to a lawsuit from environmentalists, the Biden administration is ending new leases for coal mining on federal lands in the most productive part of America's top coal producing state.

The militant group confirmed the death of its longtime leader Hassan Nasrallah in Beirut. The development marks a significant escalation many fear is inching towards a larger regional war.

Jofi Joseph, who worked on issues related to nuclear non-proliferation, was tweeting as @natsecwonk. The posts included insulting comments about other administration officials and politicians from both parties. They were also critical of policies he was helping develop. Joseph is now out of a job.

The answer, this time, isn't simply more cash, says Dr. Harold Varmus, director of the National Cancer Institute. Instead, changing the way research money is distributed might fix systemic problems.

In a family-owned cafe outside of Lisbon, select bakers make a custard treat called the Pastel de Belém, which draws fans from all over the world. But the recipe has been closely guarded since 1837.