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The almanac

UPI Almanac for Tuesday, Jan. 21, 2014.
By United Press International
Trees at Walden Pond putting out leaves earlier with climate change

Trees at Walden Pond putting out leaves earlier with climate change

BOSTON, Jan. 15 (UPI) -- Trees at Walden Pond are leafing almost 18 days earlier than when Henry David Thoreau made observations at the Massachusetts lake in the 1850s, a study found.

The almanac

UPI Almanac for Friday, Jan. 3, 2014.
By United Press International

The almanac

UPI Almanac for Thursday, Sept. 12, 2013.
By United Press International

The almanac

UPI Almanac for Friday, Aug. 9, 2013.
By United Press International

The almanac

UPI Almanac for Friday, July 12, 2013.
By United Press International

The almanac

UPI Almanac for Sunday, Jan. 20, 2013.
By United Press International

UPI NewsTrack Science and Technology News

Laser sends Mona Lisa into space ... Smartphone could quiet itself in theater ... Doubt about prehistoric 'killer walrus' ... Plants flowering earlier in climate change ... Science and Technology news from UPI.

Plants flowering earlier in climate change

MADISON, Wis., Jan. 17 (UPI) -- Native plants in the eastern United States are flowering as much as a month earlier than historically normal in response to a warming climate, scientists say.

The almanac

UPI Almanac for Thursday, Jan. 3, 2013.
By United Press International

The almanac

UPI Almanac for Wednesday, Sept. 12, 2012.
By United Press International

The almanac

UPI Almanac for Thursday, Aug. 9, 2012.
By United Press International

The almanac

UPI Almanac for Friday, Aug. 3, 2012.
By United Press International

The almanac

UPI Almanac for Thursday, July 12, 2012.
By United Press International

The almanac

UPI Almanac for Friday, Jan. 20, 2012.
By United Press International

The almanac

UPI Almanac for Tuesday, Jan. 3, 2012.
By United Press International

The almanac

UPI Almanac for Monday, July 12, 2010.
By United Press International

The almanac

UPI Almanac for Sunday, July 12, 2009.
By United Press International

Global warming changing Walden Pond

CAMBRIDGE, Mass., Oct. 29 (UPI) -- Two-thirds of the plants writer Henry David Thoreau chronicled at Walden Pond in Massachusetts have disappeared due to global warming, a U.S. study contends.

Study: Climate change effects vary greatly

CAMBRIDGE, Mass., Oct. 28 (UPI) -- U.S. scientists studying Henry David Thoreau's journals have found plant families near Walden Pond have reacted in markedly different ways to global warning.

The almanac

UPI Almanac for Saturday, July 12, 2008.
By United Press International

The almanac

UPI Almanac for Sunday, Jan. 20, 2008.
By United Press International

The almanac

UPI Almanac for Thursday, Jan. 3, 2008.
By United Press International

The almanac

UPI Almanac for Wednesday, Sept. 12, 2007.
By United Press International

The Almanac

UPI almanac for Friday, Aug. 3, 2007.
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