ACROSS
1 Thomas ___, author of An Essay on the Principle of Population, published in 1798 (7)
5 Of memory, highly precise and vivid (7)
9 The world鈥檚 tallest pine tree (5, 4)
10 2008 book on choice architecture by Richard Thaler and Cass Sunstein (5)
11 Web user (7)
12 A mound or barrow (7)
13 Data ___, the removal of flawed or incomplete information from a database (9)
15 In programming, a common business-oriented language (5)
17 Marguerite ___, French physicist who discovered francium (5)
19 Unit of frequency defined as 1012 cycles per second (9)
22 Immature ova or egg cells (7)
25 Ah (3, 4)
26 Reddish-brown pigment containing iron oxide and manganese oxide (5)
27 Quantities that may be subject to change (9)
28 Hypothetical faster-than-light particle (7)
29 Cs (7)
DOWN
1 Relating to a subatomic particle composed of one quark and one antiquark (7)
2 9.46 trillion kilometres (5, 4)
3 See 5
4 鈥淚f a ___ were to cut his ear off, no one would take it as evidence of a heightened sensibility鈥� 鈥� Peter Medawar, 1968 (9)
5/3 Space-time boundary beyond which causal relationships don鈥檛 reach (5, 7)
6 Producing motion (7)
7 ___ barrage, dam-like structure for energy production (5)
8 C8H10O2, used as a disinfectant (7)
14 Relating to the care of elderly people (9)
16 Family of Swiss mathematicians in the 17th and 18th centuries (9)
17 The result of a multiplication (7)
18 Swedish village commemorated in the names of Y, Er, Tb and Yb (7)
20 Straight-chain alkane, C7H16 (7)
21 A situation in which a participant鈥檚 gain matches the other鈥檚 loss (4鈥�3)
23 In the form of a cube (5)
24 Fourth prime number (5)
Answers to Cryptic crossword No2
ACROSS:
1 RIFT
3 SUNDRIES
9 BURUNDI
10 SHOAL
11 ARITHMETICAL
13 EDISON
15 FLEECE
17 DEMONSTRABLE
20 DRONE
21 TREMOLO
22 SADDENED
23 CEPS.
DOWN:
1 RIB CAGES
2 FERMI
4 UNISEX
5 DISTILLERIES
6 IRON AGE
7 SALT
8 ANTHROPOCENE
12 GENEROUS
14 ICE-COLD
16 TSETSE
18 BIOME
19 ODDS.